[PATCH 19/23] doc: asciidoctor: add hack for xrefs

[Felipe Contreras <felipe.contreras@gmail.com>]

The docbook manpage stylesheets convert cross-references with format the
'section called “%t”'. I personally prefer the asciidoctor version, but
for now add a hack to minimize the diff.

Thanks to the extensibility of Ruby we can override corresponding method
in the man page converter.

This fixes doc-diffs like:

          --worktree-attributes
              Look for attributes in .gitattributes files in the working tree as
  -           well (see the section called “ATTRIBUTES”).
  +           well (see ATTRIBUTES).

This can easily be removed later once we are confortable with the
asciidoctor version.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
---
 Documentation/asciidoctor-extensions.rb | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Documentation/asciidoctor-extensions.rb b/Documentation/asciidoctor-extensions.rb
index 954acb3e7d..7561973df6 100644
--- a/Documentation/asciidoctor-extensions.rb
+++ b/Documentation/asciidoctor-extensions.rb
@@ -1,4 +1,22 @@
 require 'asciidoctor/extensions'
+require 'asciidoctor/converter/manpage'
+
+module Asciidoctor
+  class Converter::ManPageConverter
+    alias orig_convert_inline_anchor convert_inline_anchor
+    def convert_inline_anchor(node)
+      case node.type
+      when :xref
+        return node.text if node.text
+        refid = node.attributes['refid']
+        'the section called &#8220;%s&#8221;' % refid.gsub('_', ' ')
+      else
+        orig_convert_inline_anchor(node)
+      end
+    end
+    alias inline_anchor convert_inline_anchor # For old versions of asciidoctor
+  end
+end
 
 Asciidoctor::Extensions.register :git do
 
-- 
2.32.0