doc: manpage: remove maximum title length

DocBook Stylesheets limit the size of the manpage titles for some
reason.

Even some of the longest git commands have no trouble fitting in 80
character terminals, so it's not clear why we would want to limit titles
to 20 characters, especially when modern terminals are much bigger.

For example:

  --- a/git-credential-cache--daemon.1
  +++ b/git-credential-cache--daemon.1
  @@ -1,4 +1,4 @@
  -GIT-CREDENTIAL-CAC(1)             Git Manual             GIT-CREDENTIAL-CAC(1)
  +GIT-CREDENTIAL-CACHE--DAEMON(1)   Git Manual   GIT-CREDENTIAL-CACHE--DAEMON(1)

   NAME
          git-credential-cache--daemon - Temporarily store user credentials in
  @@ -24,4 +24,4 @@ DESCRIPTION
   GIT
          Part of the git(1) suite

  -Git omitted                       2023-05-02             GIT-CREDENTIAL-CAC(1)
  +Git omitted                       2023-05-02   GIT-CREDENTIAL-CACHE--DAEMON(1)

Moreover, asciidoctor manpage backend doesn't limit the title length, so
we probably want to do the same for docbook backends for consistency.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/manpage-normal.xsl b/Documentation/manpage-normal.xsl
index a9c7ec69f46d8c631e86449aafdf327d8e51d435..e7aa5df2fcd2f66e36c2604a3e512ac2500a0179 100644 (file)
--- a/Documentation/manpage-normal.xsl
+++ b/Documentation/manpage-normal.xsl
@@ -8,6 +8,9 @@
 <xsl:param name="man.output.quietly" select="1"/>
 <xsl:param name="refentry.meta.get.quietly" select="1"/>
 
+<!-- unset maximum length of title -->
+<xsl:param name="man.th.title.max.length"/>
+
 <!-- convert asciidoc callouts to man page format -->
 <xsl:template match="co">
        <xsl:value-of select="concat('\fB(',substring-after(@id,'-'),')\fR')"/>