Use `none` in `parsebib--biblatex-inheritances`.

In order to resolve issue
[#231](https://github.com/joostkremers/ebib/issues/231) in Ebib, the formats of
`parsebib--biblatex-inheritances` and `ebib-biblatex-inheritances` need to be
synchronised. Using keywords somehow feels less Elisp-y, and the Ebib version is
user-customisable, where a plain symbol may be more user-friendly.

1 files changed, 47 insertions, 47 deletions

diff --git a/parsebib.el b/parsebib.el
index 94a007b..56a401f 100644
--- a/parsebib.el
+++ b/parsebib.el
@@ -60,22 +60,22 @@ id is stored in the entry in the special field `=hashid='.")
 
 (defvar parsebib--biblatex-inheritances '(;; Source                        Target
                                           ("all"                           "all"
-					   (("ids"                         . :none)
-					    ("crossref"                    . :none)
-					    ("xref"                        . :none)
-					    ("entryset"                    . :none)
-					    ("entrysubtype"                . :none)
-					    ("execute"                     . :none)
-					    ("label"                       . :none)
-					    ("options"                     . :none)
-					    ("presort"                     . :none)
-					    ("related"                     . :none)
-					    ("relatedoptions"              . :none)
-					    ("relatedstring"               . :none)
-					    ("relatedtype"                 . :none)
-					    ("shorthand"                   . :none)
-					    ("shorthandintro"              . :none)
-					    ("sortkey"                     . :none)))
+					   (("ids"                         . none)
+					    ("crossref"                    . none)
+					    ("xref"                        . none)
+					    ("entryset"                    . none)
+					    ("entrysubtype"                . none)
+					    ("execute"                     . none)
+					    ("label"                       . none)
+					    ("options"                     . none)
+					    ("presort"                     . none)
+					    ("related"                     . none)
+					    ("relatedoptions"              . none)
+					    ("relatedstring"               . none)
+					    ("relatedtype"                 . none)
+					    ("shorthand"                   . none)
+					    ("shorthandintro"              . none)
+					    ("sortkey"                     . none)))
 
                                           ;; Source                        Target
 					  ("mvbook, book"                  "inbook, bookinbook, suppbook"
@@ -87,69 +87,69 @@ id is stored in the entry in the special field `=hashid='.")
 					   (("title"                       . "maintitle")
 					    ("subtitle"                    . "mainsubtitle")
 					    ("titleaddon"                  . "maintitleaddon")
-					    ("shorttitle"                  . :none)
-					    ("sorttitle"                   . :none)
-					    ("indextitle"                  . :none)
-					    ("indexsorttitle"              . :none)))
+					    ("shorttitle"                  . none)
+					    ("sorttitle"                   . none)
+					    ("indextitle"                  . none)
+					    ("indexsorttitle"              . none)))
 
                                           ;; Source                        Target
 					  ("mvcollection, mvreference"     "collection, reference, incollection, inreference, suppcollection"
 					   (("title"                       . "maintitle")
 					    ("subtitle"                    . "mainsubtitle")
 					    ("titleaddon"                  . "maintitleaddon")
-					    ("shorttitle"                  . :none)
-					    ("sorttitle"                   . :none)
-					    ("indextitle"                  . :none)
-					    ("indexsorttitle"              . :none)))
+					    ("shorttitle"                  . none)
+					    ("sorttitle"                   . none)
+					    ("indextitle"                  . none)
+					    ("indexsorttitle"              . none)))
 
                                           ;; Source                        Target
 					  ("mvproceedings"                 "proceedings, inproceedings"
 					   (("title"                       . "maintitle")
 					    ("subtitle"                    . "mainsubtitle")
 					    ("titleaddon"                  . "maintitleaddon")
-					    ("shorttitle"                  . :none)
-					    ("sorttitle"                   . :none)
-					    ("indextitle"                  . :none)
-					    ("indexsorttitle"              . :none)))
+					    ("shorttitle"                  . none)
+					    ("sorttitle"                   . none)
+					    ("indextitle"                  . none)
+					    ("indexsorttitle"              . none)))
 
                                           ;; Source                        Target
 					  ("book"                          "inbook, bookinbook, suppbook"
 					   (("title"                       . "booktitle")
 					    ("subtitle"                    . "booksubtitle")
 					    ("titleaddon"                  . "booktitleaddon")
-					    ("shorttitle"                  . :none)
-					    ("sorttitle"                   . :none)
-					    ("indextitle"                  . :none)
-					    ("indexsorttitle"              . :none)))
+					    ("shorttitle"                  . none)
+					    ("sorttitle"                   . none)
+					    ("indextitle"                  . none)
+					    ("indexsorttitle"              . none)))
 
                                           ;; Source                        Target
 					  ("collection, reference"         "incollection, inreference, suppcollection"
 					   (("title"                       . "booktitle")
 					    ("subtitle"                    . "booksubtitle")
 					    ("titleaddon"                  . "booktitleaddon")
-					    ("shorttitle"                  . :none)
-					    ("sorttitle"                   . :none)
-					    ("indextitle"                  . :none)
-					    ("indexsorttitle"              . :none)))
+					    ("shorttitle"                  . none)
+					    ("sorttitle"                   . none)
+					    ("indextitle"                  . none)
+					    ("indexsorttitle"              . none)))
 
                                           ;; Source                        Target
 					  ("proceedings"                   "inproceedings"
 					   (("title"                       . "booktitle")
 					    ("subtitle"                    . "booksubtitle")
 					    ("titleaddon"                  . "booktitleaddon")
-					    ("shorttitle"                  . :none)
-					    ("sorttitle"                   . :none)
-					    ("indextitle"                  . :none)
-					    ("indexsorttitle"              . :none)))
+					    ("shorttitle"                  . none)
+					    ("sorttitle"                   . none)
+					    ("indextitle"                  . none)
+					    ("indexsorttitle"              . none)))
 
                                           ;; Source                        Target
 					  ("periodical"                    "article, suppperiodical"
 					   (("title"                       . "journaltitle")
 					    ("subtitle"                    . "journalsubtitle")
-					    ("shorttitle"                  . :none)
-					    ("sorttitle"                   . :none)
-					    ("indextitle"                  . :none)
-					    ("indexsorttitle"              . :none))))
+					    ("shorttitle"                  . none)
+					    ("sorttitle"                   . none)
+					    ("indextitle"                  . none)
+					    ("indexsorttitle"              . none))))
 
   "Inheritance scheme for BibLaTeX cross-referencing.
 Inheritances are specified for pairs of source and target entry
@@ -165,7 +165,7 @@ comma-separated list of entry types.
 If no inheritance rule is set up for a given entry type+field
 combination, the field inherits from the same-name field in the
 cross-referenced entry.  If no inheritance should take place, the
-target field is set to the symbol `:none'.")
+target field is set to the symbol `none'.")
 
 ;; Regexes describing BibTeX identifiers and keys.  Note that while $ ^ & are
 ;; valid in BibTeX keys, they may nonetheless be problematic, because they are
@@ -330,7 +330,7 @@ such an inheritance schema."
 Inheritance is determined by INHERITANCES, which is an alist of
 source/target pairs.  If no inheritance should take place for
 SOURCE-FIELD, the target in the relevant item in INHERITANCES is
-the symbol `:none'.  If there is no item for SOURCE-FIELD in
+the symbol `none'.  If there is no item for SOURCE-FIELD in
 INHERITANCES, SOURCE-FIELD is returned.  Note that it is valid
 for INHERITANCES to be nil."
   ;; Note: the argument INHERITANCES differs from the INHERITANCE argument in
@@ -340,7 +340,7 @@ for INHERITANCES to be nil."
     (cond
      ((null target-field)
       source-field)
-     ((eq target-field :none)
+     ((eq target-field 'none)
       nil)
      (t target-field))))