From 56951b873e0177f7472249affcee40f6d58930c7 Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Wed, 27 Dec 2017 09:53:50 -0800
Subject: Updated man page.

---
 man/pandoc.1 | 607 +++++++++++++++++++++++++++++++++++------------------------
 1 file changed, 358 insertions(+), 249 deletions(-)

diff --git a/man/pandoc.1 b/man/pandoc.1
index 5ab806542..165fb124b 100644
--- a/man/pandoc.1
+++ b/man/pandoc.1
@@ -242,19 +242,10 @@ markup), \f[C]tikiwiki\f[] (TikiWiki markup), \f[C]creole\f[] (Creole
 1.0), \f[C]haddock\f[] (Haddock markup), or \f[C]latex\f[] (LaTeX).
 (\f[C]markdown_github\f[] provides deprecated and less accurate support
 for Github\-Flavored Markdown; please use \f[C]gfm\f[] instead, unless
-you need to use extensions other than \f[C]smart\f[].) If \f[C]+lhs\f[]
-is appended to \f[C]markdown\f[], \f[C]rst\f[], \f[C]latex\f[], or
-\f[C]html\f[], the input will be treated as literate Haskell source: see
-Literate Haskell support, below.
-Markdown syntax extensions can be individually enabled or disabled by
-appending \f[C]+EXTENSION\f[] or \f[C]\-EXTENSION\f[] to the format
-name.
-So, for example, \f[C]markdown_strict+footnotes+definition_lists\f[] is
-strict Markdown with footnotes and definition lists enabled, and
-\f[C]markdown\-pipe_tables+hard_line_breaks\f[] is pandoc\[aq]s Markdown
-without pipe tables and with hard line breaks.
-See Pandoc\[aq]s Markdown, below, for a list of extensions and their
-names.
+you need to use extensions other than \f[C]smart\f[].) Extensions can be
+individually enabled or disabled by appending \f[C]+EXTENSION\f[] or
+\f[C]\-EXTENSION\f[] to the format name.
+See Extensions below, for a list of extensions and their names.
 See \f[C]\-\-list\-input\-formats\f[] and \f[C]\-\-list\-extensions\f[],
 below.
 .RS
@@ -295,13 +286,9 @@ you use extensions that do not work with \f[C]gfm\f[].) Note that
 \f[C]odt\f[], \f[C]epub\f[], and \f[C]epub3\f[] output will not be
 directed to \f[I]stdout\f[]; an output filename must be specified using
 the \f[C]\-o/\-\-output\f[] option.
-If \f[C]+lhs\f[] is appended to \f[C]markdown\f[], \f[C]rst\f[],
-\f[C]latex\f[], \f[C]beamer\f[], \f[C]html4\f[], or \f[C]html5\f[], the
-output will be rendered as literate Haskell source: see Literate Haskell
-support, below.
-Markdown syntax extensions can be individually enabled or disabled by
-appending \f[C]+EXTENSION\f[] or \f[C]\-EXTENSION\f[] to the format
-name, as described above under \f[C]\-f\f[].
+Extensions can be individually enabled or disabled by appending
+\f[C]+EXTENSION\f[] or \f[C]\-EXTENSION\f[] to the format name.
+See Extensions below, for a list of extensions and their names.
 See \f[C]\-\-list\-output\-formats\f[] and
 \f[C]\-\-list\-extensions\f[], below.
 .RS
@@ -2035,6 +2022,336 @@ merge in changes after each pandoc release.
 .PP
 Templates may contain comments: anything on a line after \f[C]$\-\-\f[]
 will be treated as a comment and ignored.
+.SH EXTENSIONS
+.PP
+The behavior of some of the readers and writers can be adjusted by
+enabling or disabling various extensions.
+.PP
+An extension can be enabled by adding \f[C]+EXTENSION\f[] to the format
+name and disabled by adding \f[C]\-EXTENSION\f[].
+For example, \f[C]\-\-from\ markdown_strict+footnotes\f[] is strict
+Markdown with footnotes enabled, while
+\f[C]\-\-from\ markdown\-footnotes\-pipe_tables\f[] is pandoc\[aq]s
+Markdown without footnotes or pipe tables.
+.PP
+The markdown reader and writer make by far the most use of extensions.
+Extensions only used by them are therefore covered in the section
+Pandoc\[aq]s Markdown below (See Markdown variants for
+\f[C]commonmark\f[] and \f[C]gfm\f[].) In the following, extensions that
+also work for other formats are covered.
+.SS Typography
+.SS Extension: \f[C]smart\f[]
+.PP
+Interpret straight quotes as curly quotes, \f[C]\-\-\-\f[] as
+em\-dashes, \f[C]\-\-\f[] as en\-dashes, and \f[C]\&...\f[] as ellipses.
+Nonbreaking spaces are inserted after certain abbreviations, such as
+"Mr."
+.PP
+This extension can be enabled/disabled for the following formats:
+.TP
+.B input formats
+\f[C]markdown\f[], \f[C]commonmark\f[], \f[C]latex\f[],
+\f[C]mediawiki\f[], \f[C]org\f[], \f[C]rst\f[], \f[C]twiki\f[]
+.RS
+.RE
+.TP
+.B output formats
+\f[C]markdown\f[], \f[C]latex\f[], \f[C]context\f[], \f[C]rst\f[]
+.RS
+.RE
+.TP
+.B enabled by default in
+\f[C]markdown\f[], \f[C]latex\f[], \f[C]context\f[] (both input and
+output)
+.RS
+.RE
+.PP
+Note: If you are \f[I]writing\f[] Markdown, then the \f[C]smart\f[]
+extension has the reverse effect: what would have been curly quotes
+comes out straight.
+.PP
+In LaTeX, \f[C]smart\f[] means to use the standard TeX ligatures for
+quotation marks (\f[C]``\f[] and \f[C]\[aq]\[aq]\f[] for double quotes,
+\f[C]`\f[] and \f[C]\[aq]\f[] for single quotes) and dashes
+(\f[C]\-\-\f[] for en\-dash and \f[C]\-\-\-\f[] for em\-dash).
+If \f[C]smart\f[] is disabled, then in reading LaTeX pandoc will parse
+these characters literally.
+In writing LaTeX, enabling \f[C]smart\f[] tells pandoc to use the
+ligatures when possible; if \f[C]smart\f[] is disabled pandoc will use
+unicode quotation mark and dash characters.
+.SS Headers and sections
+.SS Extension: \f[C]auto_identifiers\f[]
+.PP
+A header without an explicitly specified identifier will be
+automatically assigned a unique identifier based on the header text.
+.PP
+This extension can be enabled/disabled for the following formats:
+.TP
+.B input formats
+\f[C]markdown\f[], \f[C]latex\f[], \f[C]rst\f[], \f[C]mediawiki\f[],
+\f[C]textile\f[]
+.RS
+.RE
+.TP
+.B output formats
+\f[C]markdown\f[], \f[C]muse\f[]
+.RS
+.RE
+.TP
+.B enabled by default in
+\f[C]markdown\f[], \f[C]muse\f[]
+.RS
+.RE
+.PP
+The algorithm used to derive the identifier from the header text is:
+.IP \[bu] 2
+Remove all formatting, links, etc.
+.IP \[bu] 2
+Remove all footnotes.
+.IP \[bu] 2
+Remove all punctuation, except underscores, hyphens, and periods.
+.IP \[bu] 2
+Replace all spaces and newlines with hyphens.
+.IP \[bu] 2
+Convert all alphabetic characters to lowercase.
+.IP \[bu] 2
+Remove everything up to the first letter (identifiers may not begin with
+a number or punctuation mark).
+.IP \[bu] 2
+If nothing is left after this, use the identifier \f[C]section\f[].
+.PP
+Thus, for example,
+.PP
+.TS
+tab(@);
+l l.
+T{
+Header
+T}@T{
+Identifier
+T}
+_
+T{
+\f[C]Header\ identifiers\ in\ HTML\f[]
+T}@T{
+\f[C]header\-identifiers\-in\-html\f[]
+T}
+T{
+\f[C]*Dogs*?\-\-in\ *my*\ house?\f[]
+T}@T{
+\f[C]dogs\-\-in\-my\-house\f[]
+T}
+T{
+\f[C][HTML],\ [S5],\ or\ [RTF]?\f[]
+T}@T{
+\f[C]html\-s5\-or\-rtf\f[]
+T}
+T{
+\f[C]3.\ Applications\f[]
+T}@T{
+\f[C]applications\f[]
+T}
+T{
+\f[C]33\f[]
+T}@T{
+\f[C]section\f[]
+T}
+.TE
+.PP
+These rules should, in most cases, allow one to determine the identifier
+from the header text.
+The exception is when several headers have the same text; in this case,
+the first will get an identifier as described above; the second will get
+the same identifier with \f[C]\-1\f[] appended; the third with
+\f[C]\-2\f[]; and so on.
+.PP
+These identifiers are used to provide link targets in the table of
+contents generated by the \f[C]\-\-toc|\-\-table\-of\-contents\f[]
+option.
+They also make it easy to provide links from one section of a document
+to another.
+A link to this section, for example, might look like this:
+.IP
+.nf
+\f[C]
+See\ the\ section\ on
+[header\ identifiers](#header\-identifiers\-in\-html\-latex\-and\-context).
+\f[]
+.fi
+.PP
+Note, however, that this method of providing links to sections works
+only in HTML, LaTeX, and ConTeXt formats.
+.PP
+If the \f[C]\-\-section\-divs\f[] option is specified, then each section
+will be wrapped in a \f[C]div\f[] (or a \f[C]section\f[], if
+\f[C]html5\f[] was specified), and the identifier will be attached to
+the enclosing \f[C]<div>\f[] (or \f[C]<section>\f[]) tag rather than the
+header itself.
+This allows entire sections to be manipulated using JavaScript or
+treated differently in CSS.
+.SS Extension: \f[C]ascii_identifiers\f[]
+.PP
+Causes the identifiers produced by \f[C]auto_identifiers\f[] to be pure
+ASCII.
+Accents are stripped off of accented Latin letters, and non\-Latin
+letters are omitted.
+.SS Math Input
+.PP
+The extensions \f[C]tex_math_dollars\f[],
+\f[C]tex_math_single_backslash\f[], and
+\f[C]tex_math_double_backslash\f[] are described in the section about
+Pandoc\[aq]s Markdown.
+.PP
+However, they can also be used with HTML input.
+This is handy for reading web pages formatted using MathJax, for
+example.
+.SS Raw HTML/TeX
+.PP
+The following extensions (especially how they affect Markdown
+input/output) are also described in more detail in their respective
+sections of Pandoc\[aq]s Markdown.
+.SS Extension: \f[C]raw_html\f[]
+.PP
+When converting from HTML, parse elements to raw HTML which are not
+representable in pandoc\[aq]s AST.
+By default, this is disabled for HTML input.
+.SS Extension: \f[C]raw_tex\f[]
+.PP
+Allows raw LaTeX, TeX, and ConTeXt to be included in a document.
+.PP
+This extension can be enabled/disabled for the following formats (in
+addition to \f[C]markdown\f[]):
+.TP
+.B input formats
+\f[C]latex\f[], \f[C]org\f[], \f[C]textile\f[]
+.RS
+.RE
+.TP
+.B output formats
+\f[C]textile\f[]
+.RS
+.RE
+.SS Extension: \f[C]native_divs\f[]
+.PP
+This extension is enabled by default for HTML input.
+This means that \f[C]div\f[]s are parsed to pandoc native elements.
+(Alternatively, you can parse them to raw HTML using
+\f[C]\-f\ html\-native_divs+raw_html\f[].)
+.PP
+When converting HTML to Markdown, for example, you may want to drop all
+\f[C]div\f[]s and \f[C]span\f[]s:
+.IP
+.nf
+\f[C]
+pandoc\ \-f\ html\-native_divs\-native_spans\ \-t\ markdown
+\f[]
+.fi
+.SS Extension: \f[C]native_spans\f[]
+.PP
+Analogous to \f[C]native_divs\f[] above.
+.SS Literate Haskell support
+.SS Extension: \f[C]literate_haskell\f[]
+.PP
+Treat the document as literate Haskell source.
+.PP
+This extension can be enabled/disabled for the following formats:
+.TP
+.B input formats
+\f[C]markdown\f[], \f[C]rst\f[], \f[C]latex\f[]
+.RS
+.RE
+.TP
+.B output formats
+\f[C]markdown\f[], \f[C]rst\f[], \f[C]latex\f[], \f[C]html\f[]
+.RS
+.RE
+.PP
+If you append \f[C]+lhs\f[] (or \f[C]+literate_haskell\f[]) to one of
+the formats above, pandoc will treat the document as literate Haskell
+source.
+This means that
+.IP \[bu] 2
+In Markdown input, "bird track" sections will be parsed as Haskell code
+rather than block quotations.
+Text between \f[C]\\begin{code}\f[] and \f[C]\\end{code}\f[] will also
+be treated as Haskell code.
+For ATX\-style headers the character \[aq]=\[aq] will be used instead of
+\[aq]#\[aq].
+.IP \[bu] 2
+In Markdown output, code blocks with classes \f[C]haskell\f[] and
+\f[C]literate\f[] will be rendered using bird tracks, and block
+quotations will be indented one space, so they will not be treated as
+Haskell code.
+In addition, headers will be rendered setext\-style (with underlines)
+rather than ATX\-style (with \[aq]#\[aq] characters).
+(This is because ghc treats \[aq]#\[aq] characters in column 1 as
+introducing line numbers.)
+.IP \[bu] 2
+In restructured text input, "bird track" sections will be parsed as
+Haskell code.
+.IP \[bu] 2
+In restructured text output, code blocks with class \f[C]haskell\f[]
+will be rendered using bird tracks.
+.IP \[bu] 2
+In LaTeX input, text in \f[C]code\f[] environments will be parsed as
+Haskell code.
+.IP \[bu] 2
+In LaTeX output, code blocks with class \f[C]haskell\f[] will be
+rendered inside \f[C]code\f[] environments.
+.IP \[bu] 2
+In HTML output, code blocks with class \f[C]haskell\f[] will be rendered
+with class \f[C]literatehaskell\f[] and bird tracks.
+.PP
+Examples:
+.IP
+.nf
+\f[C]
+pandoc\ \-f\ markdown+lhs\ \-t\ html
+\f[]
+.fi
+.PP
+reads literate Haskell source formatted with Markdown conventions and
+writes ordinary HTML (without bird tracks).
+.IP
+.nf
+\f[C]
+pandoc\ \-f\ markdown+lhs\ \-t\ html+lhs
+\f[]
+.fi
+.PP
+writes HTML with the Haskell code in bird tracks, so it can be copied
+and pasted as literate Haskell source.
+.PP
+Note that GHC expects the bird tracks in the first column, so indentend
+literate code blocks (e.g.
+inside an itemized environment) will not be picked up by the Haskell
+compiler.
+.SS Other extensions
+.SS Extension: \f[C]empty_paragraphs\f[]
+.PP
+Allows empty paragraphs.
+By default empty paragraphs are omitted.
+.PP
+This extension can be enabled/disabled for the following formats:
+.TP
+.B input formats
+\f[C]docx\f[], \f[C]html\f[]
+.RS
+.RE
+.TP
+.B output formats
+\f[C]markdown\f[], \f[C]docx\f[], \f[C]odt\f[], \f[C]opendocument\f[],
+\f[C]html\f[]
+.RS
+.RE
+.SS Extension: \f[C]amuse\f[]
+.PP
+In the \f[C]muse\f[] input format, this enables Text::Amuse extensions
+to Emacs Muse markup.
+.SS Extension: \f[C]citations\f[]
+.PP
+Some aspects of Pandoc\[aq]s Markdown citation syntax are also accepted
+in \f[C]org\f[] input.
 .SH PANDOC\[aq]S MARKDOWN
 .PP
 Pandoc understands an extended and slightly revised version of John
@@ -2043,11 +2360,11 @@ This document explains the syntax, noting differences from standard
 Markdown.
 Except where noted, these differences can be suppressed by using the
 \f[C]markdown_strict\f[] format instead of \f[C]markdown\f[].
-An extensions can be enabled by adding \f[C]+EXTENSION\f[] to the format
-name and disabled by adding \f[C]\-EXTENSION\f[].
-For example, \f[C]markdown_strict+footnotes\f[] is strict Markdown with
-footnotes enabled, while \f[C]markdown\-footnotes\-pipe_tables\f[] is
-pandoc\[aq]s Markdown without footnotes or pipe tables.
+Extensions can be enabled or disabled to specify the behavior more
+granularly.
+They are described in the following.
+See also Extensions above, for extensions that work also on other
+formats.
 .SS Philosophy
 .PP
 Markdown is designed to be easy to write, and, even more importantly,
@@ -2149,6 +2466,8 @@ Many Markdown implementations do not require a space between the opening
 \f[C]#5\ bolt\f[] and \f[C]#hashtag\f[] count as headers.
 With this extension, pandoc does require the space.
 .SS Header identifiers
+.PP
+See also the \f[C]auto_identifiers\f[] extension above.
 .SS Extension: \f[C]header_attributes\f[]
 .PP
 Headers can be assigned attributes using this syntax at the end of the
@@ -2203,96 +2522,6 @@ is just the same as
 #\ My\ header\ {.unnumbered}
 \f[]
 .fi
-.SS Extension: \f[C]auto_identifiers\f[]
-.PP
-A header without an explicitly specified identifier will be
-automatically assigned a unique identifier based on the header text.
-To derive the identifier from the header text,
-.IP \[bu] 2
-Remove all formatting, links, etc.
-.IP \[bu] 2
-Remove all footnotes.
-.IP \[bu] 2
-Remove all punctuation, except underscores, hyphens, and periods.
-.IP \[bu] 2
-Replace all spaces and newlines with hyphens.
-.IP \[bu] 2
-Convert all alphabetic characters to lowercase.
-.IP \[bu] 2
-Remove everything up to the first letter (identifiers may not begin with
-a number or punctuation mark).
-.IP \[bu] 2
-If nothing is left after this, use the identifier \f[C]section\f[].
-.PP
-Thus, for example,
-.PP
-.TS
-tab(@);
-l l.
-T{
-Header
-T}@T{
-Identifier
-T}
-_
-T{
-\f[C]Header\ identifiers\ in\ HTML\f[]
-T}@T{
-\f[C]header\-identifiers\-in\-html\f[]
-T}
-T{
-\f[C]*Dogs*?\-\-in\ *my*\ house?\f[]
-T}@T{
-\f[C]dogs\-\-in\-my\-house\f[]
-T}
-T{
-\f[C][HTML],\ [S5],\ or\ [RTF]?\f[]
-T}@T{
-\f[C]html\-s5\-or\-rtf\f[]
-T}
-T{
-\f[C]3.\ Applications\f[]
-T}@T{
-\f[C]applications\f[]
-T}
-T{
-\f[C]33\f[]
-T}@T{
-\f[C]section\f[]
-T}
-.TE
-.PP
-These rules should, in most cases, allow one to determine the identifier
-from the header text.
-The exception is when several headers have the same text; in this case,
-the first will get an identifier as described above; the second will get
-the same identifier with \f[C]\-1\f[] appended; the third with
-\f[C]\-2\f[]; and so on.
-.PP
-These identifiers are used to provide link targets in the table of
-contents generated by the \f[C]\-\-toc|\-\-table\-of\-contents\f[]
-option.
-They also make it easy to provide links from one section of a document
-to another.
-A link to this section, for example, might look like this:
-.IP
-.nf
-\f[C]
-See\ the\ section\ on
-[header\ identifiers](#header\-identifiers\-in\-html\-latex\-and\-context).
-\f[]
-.fi
-.PP
-Note, however, that this method of providing links to sections works
-only in HTML, LaTeX, and ConTeXt formats.
-.PP
-If the \f[C]\-\-section\-divs\f[] option is specified, then each section
-will be wrapped in a \f[C]div\f[] (or a \f[C]section\f[], if
-\f[C]html5\f[] was specified), and the identifier will be attached to
-the enclosing \f[C]<div>\f[] (or \f[C]<section>\f[]) tag rather than the
-header itself.
-This allows entire sections to be manipulated using JavaScript or
-treated differently in CSS.
 .SS Extension: \f[C]implicit_header_references\f[]
 .PP
 Pandoc behaves as if reference links have been defined for each header.
@@ -3763,9 +3992,6 @@ options selected.
 Therefore see Math rendering in HTML above.
 .RS
 .RE
-.PP
-This extension can be used with both \f[C]markdown\f[] and \f[C]html\f[]
-input.
 .SS Raw HTML
 .SS Extension: \f[C]raw_html\f[]
 .PP
@@ -4300,32 +4526,6 @@ note.]
 .fi
 .PP
 Inline and regular footnotes may be mixed freely.
-.SS Typography
-.SS Extension: \f[C]smart\f[]
-.PP
-Interpret straight quotes as curly quotes, \f[C]\-\-\-\f[] as
-em\-dashes, \f[C]\-\-\f[] as en\-dashes, and \f[C]\&...\f[] as ellipses.
-Nonbreaking spaces are inserted after certain abbreviations, such as
-"Mr." This option currently affects the input formats \f[C]markdown\f[],
-\f[C]commonmark\f[], \f[C]latex\f[], \f[C]mediawiki\f[], \f[C]org\f[],
-\f[C]rst\f[], and \f[C]twiki\f[], and the output formats
-\f[C]markdown\f[], \f[C]latex\f[], and \f[C]context\f[].
-It is enabled by default for \f[C]markdown\f[], \f[C]latex\f[], and
-\f[C]context\f[] (in both input and output).
-.PP
-Note: If you are \f[I]writing\f[] Markdown, then the \f[C]smart\f[]
-extension has the reverse effect: what would have been curly quotes
-comes out straight.
-.PP
-In LaTeX, \f[C]smart\f[] means to use the standard TeX ligatures for
-quotation marks (\f[C]``\f[] and \f[C]\[aq]\[aq]\f[] for double quotes,
-\f[C]`\f[] and \f[C]\[aq]\f[] for single quotes) and dashes
-(\f[C]\-\-\f[] for en\-dash and \f[C]\-\-\-\f[] for em\-dash).
-If \f[C]smart\f[] is disabled, then in reading LaTeX pandoc will parse
-these characters literally.
-In writing LaTeX, enabling \f[C]smart\f[] tells pandoc to use the
-ligatures when possible; if \f[C]smart\f[] is disabled pandoc will use
-unicode quotation mark and dash characters.
 .SS Citations
 .SS Extension: \f[C]citations\f[]
 .PP
@@ -4689,9 +4889,6 @@ as inline TeX math, and anything between \f[C]\\[\f[] and \f[C]\\]\f[]
 to be interpreted as display TeX math.
 Note: a drawback of this extension is that it precludes escaping
 \f[C](\f[] and \f[C][\f[].
-.PP
-This extension can be used with both \f[C]markdown\f[] and \f[C]html\f[]
-input.
 .SS Extension: \f[C]tex_math_double_backslash\f[]
 .PP
 Causes anything between \f[C]\\\\(\f[] and \f[C]\\\\)\f[] to be
@@ -4739,12 +4936,6 @@ opposed to being parsed as paragraphs).
 .PP
 Makes all absolute URIs into links, even when not surrounded by pointy
 braces \f[C]<...>\f[].
-.SS Extension: \f[C]ascii_identifiers\f[]
-.PP
-Causes the identifiers produced by \f[C]auto_identifiers\f[] to be pure
-ASCII.
-Accents are stripped off of accented Latin letters, and non\-Latin
-letters are omitted.
 .SS Extension: \f[C]mmd_link_attributes\f[]
 .PP
 Parses multimarkdown style key\-value attributes on link and image
@@ -4779,13 +4970,6 @@ anything.
 .IP \[bu] 2
 Lazy wrapping of paragraphs is not allowed: the entire definition must
 be indented four spaces.
-.SS Extension: \f[C]empty_paragraphs\f[]
-.PP
-Allows empty paragraphs.
-By default empty paragraphs are omitted.
-This affects the \f[C]docx\f[] reader and writer, the
-\f[C]opendocument\f[] and \f[C]odt\f[] writer, and all HTML\-based
-readers and writers.
 .SS Markdown variants
 .PP
 In addition to pandoc\[aq]s extended Markdown, the following Markdown
@@ -4831,37 +5015,26 @@ variants are supported:
 .RS
 .RE
 .PP
-We also support \f[C]gfm\f[] (GitHub\-Flavored Markdown) as a set of
-extensions on \f[C]commonmark\f[]:
+We also support \f[C]commonmark\f[] and \f[C]gfm\f[] (GitHub\-Flavored
+Markdown, which is implemented as a set of extensions on
+\f[C]commonmark\f[]).
 .PP
-: \f[C]pipe_tables\f[], \f[C]raw_html\f[], \f[C]fenced_code_blocks\f[],
+Note, however, that \f[C]commonmark\f[] and \f[C]gfm\f[] have limited
+support for extensions.
+Only those listed below (and \f[C]smart\f[] and \f[C]raw_tex\f[]) will
+work.
+The extensions can, however, all be individually disabled.
+Also, \f[C]raw_tex\f[] only affects \f[C]gfm\f[] output, not input.
+.TP
+.B \f[C]gfm\f[] (GitHub\-Flavored Markdown)
+\f[C]pipe_tables\f[], \f[C]raw_html\f[], \f[C]fenced_code_blocks\f[],
 \f[C]auto_identifiers\f[], \f[C]ascii_identifiers\f[],
 \f[C]backtick_code_blocks\f[], \f[C]autolink_bare_uris\f[],
 \f[C]intraword_underscores\f[], \f[C]strikeout\f[],
 \f[C]hard_line_breaks\f[], \f[C]emoji\f[],
 \f[C]shortcut_reference_links\f[], \f[C]angle_brackets_escapable\f[].
-.IP
-.nf
-\f[C]
-These\ can\ all\ be\ individually\ disabled.\ Note,\ however,\ that
-`commonmark`\ and\ `gfm`\ have\ limited\ support\ for\ extensions:
-extensions\ other\ than\ those\ listed\ above\ (and\ `smart`\ and
-`raw_tex`)\ will\ have\ no\ effect\ on\ `commonmark`\ or\ `gfm`.
-And\ `raw_tex`\ only\ affects\ `gfm`\ output,\ not\ input.
-\f[]
-.fi
-.SS Extensions with formats other than Markdown
-.PP
-Some of the extensions discussed above can be used with formats other
-than Markdown:
-.IP \[bu] 2
-\f[C]auto_identifiers\f[] can be used with \f[C]latex\f[], \f[C]rst\f[],
-\f[C]mediawiki\f[], and \f[C]textile\f[] input (and is used by default).
-.IP \[bu] 2
-\f[C]tex_math_dollars\f[], \f[C]tex_math_single_backslash\f[], and
-\f[C]tex_math_double_backslash\f[] can be used with \f[C]html\f[] input.
-(This is handy for reading web pages formatted using MathJax, for
-example.)
+.RS
+.RE
 .SH PRODUCING SLIDE SHOWS WITH PANDOC
 .PP
 You can use pandoc to produce an HTML + JavaScript slide presentation
@@ -5313,70 +5486,6 @@ For example:
 </audio>
 \f[]
 .fi
-.SH LITERATE HASKELL SUPPORT
-.PP
-If you append \f[C]+lhs\f[] (or \f[C]+literate_haskell\f[]) to an
-appropriate input or output format (\f[C]markdown\f[],
-\f[C]markdown_strict\f[], \f[C]rst\f[], or \f[C]latex\f[] for input or
-output; \f[C]beamer\f[], \f[C]html4\f[] or \f[C]html5\f[] for output
-only), pandoc will treat the document as literate Haskell source.
-This means that
-.IP \[bu] 2
-In Markdown input, "bird track" sections will be parsed as Haskell code
-rather than block quotations.
-Text between \f[C]\\begin{code}\f[] and \f[C]\\end{code}\f[] will also
-be treated as Haskell code.
-For ATX\-style headers the character \[aq]=\[aq] will be used instead of
-\[aq]#\[aq].
-.IP \[bu] 2
-In Markdown output, code blocks with classes \f[C]haskell\f[] and
-\f[C]literate\f[] will be rendered using bird tracks, and block
-quotations will be indented one space, so they will not be treated as
-Haskell code.
-In addition, headers will be rendered setext\-style (with underlines)
-rather than ATX\-style (with \[aq]#\[aq] characters).
-(This is because ghc treats \[aq]#\[aq] characters in column 1 as
-introducing line numbers.)
-.IP \[bu] 2
-In restructured text input, "bird track" sections will be parsed as
-Haskell code.
-.IP \[bu] 2
-In restructured text output, code blocks with class \f[C]haskell\f[]
-will be rendered using bird tracks.
-.IP \[bu] 2
-In LaTeX input, text in \f[C]code\f[] environments will be parsed as
-Haskell code.
-.IP \[bu] 2
-In LaTeX output, code blocks with class \f[C]haskell\f[] will be
-rendered inside \f[C]code\f[] environments.
-.IP \[bu] 2
-In HTML output, code blocks with class \f[C]haskell\f[] will be rendered
-with class \f[C]literatehaskell\f[] and bird tracks.
-.PP
-Examples:
-.IP
-.nf
-\f[C]
-pandoc\ \-f\ markdown+lhs\ \-t\ html
-\f[]
-.fi
-.PP
-reads literate Haskell source formatted with Markdown conventions and
-writes ordinary HTML (without bird tracks).
-.IP
-.nf
-\f[C]
-pandoc\ \-f\ markdown+lhs\ \-t\ html+lhs
-\f[]
-.fi
-.PP
-writes HTML with the Haskell code in bird tracks, so it can be copied
-and pasted as literate Haskell source.
-.PP
-Note that GHC expects the bird tracks in the first column, so indentend
-literate code blocks (e.g.
-inside an itemized environment) will not be picked up by the Haskell
-compiler.
 .SH SYNTAX HIGHLIGHTING
 .PP
 Pandoc will automatically highlight syntax in fenced code blocks that
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