Change the metadata format to YAML

Change the metadata format to a single YAML file, with a slightly
different internal representation, whose default location is
docs/docknot.yaml.  The new docknot update command (or the
App::DocKnot::Update module) will convert from the old JSON format.
The new metadata format is checked against a schema when read.
DocKnot now depends on YAML::XS and Kwalify.

Word wrap numeric lists and, in Markdown output, quoted paragraphs.
Previously these preserved the original spacing from the input text
snippets.

Require paragraphs be indented by at least six spaces, not five, to be
treated as verbatim paragraphs and left unwrapped.  (Markdown
paragraphs can still use four spaces because they are wrapped in
markup lines.)

1 files changed, 7 insertions, 0 deletions

diff --git a/t/data/update/rra-c-util/old/blurb b/t/data/update/rra-c-util/old/blurb
new file mode 100644
index 0000000..0e5f5ad
--- /dev/null
+++ b/t/data/update/rra-c-util/old/blurb
@@ -0,0 +1,7 @@
+rra-c-util is my collection of portability functions, utility functions,
+Autoconf macros, and related shared C infrastructure, akin to gnulib but
+without any GPL-covered code and additional support for Kerberos and PAM
+development.  It serves as a common repository of code and infrastructure
+used across multiple projects so that files have a canonical latest
+version.  It's not intended for installation as a regular package;
+instead, other packages are expected to copy files from here as needed.