Add reStructuredText (RST) documentation formatter

Temporarily add a RST formatter to convert builtin documentation to .rst
source files.  This will be removed shortly after we use it to convert
documentation.

Teach the RST formatter to:

* Output preformatted blocks as reStructuredText "::" literal blocks.

* Output option lists as bullet lists with option names enclosed in
  reStructuredText ``literal`` quoting.

* Output individual documentation objects (commands, variables, etc.)
  in separate .rst files organized in directories by type.

Replace references to cmVersion::GetCMakeVersion() in builtin
documentation with the literal placeholder "|release|" that will be
defined as a substitution later.

1 files changed, 1 insertions, 1 deletions

diff --git a/Source/cmDocumentationFormatter.h b/Source/cmDocumentationFormatter.h
index d8ce613..9278297 100644
--- a/Source/cmDocumentationFormatter.h
+++ b/Source/cmDocumentationFormatter.h
@@ -31,7 +31,7 @@ public:
     CompatCommands, Copyright, Version, Policies, SinglePolicy };
 
   /** Forms of documentation output.  */
-  enum Form { TextForm, HTMLForm, ManForm, UsageForm, DocbookForm };
+  enum Form { TextForm, HTMLForm, RSTForm, ManForm, UsageForm, DocbookForm };
 };
 
 class cmDocumentationSection;