[PATCH] Tweak asciidoc output to work with broken docbook-xsl

[Francis Daly <francis@daoine.org>]

docbook-xsl v1.68 incorrectly converts "<screen>" from docbook to
manpage by not rendering it verbatim. v1.69 handles it correctly, but
not many current popular distributions ship with it.

asciidoc by default converts "listingblock" to "<screen>". This change
causes asciidoc in git to convert "listingblock" to "<literallayout>", which
both old and new docbook-xsl handle correctly.

The difference can be seen in any manpage which includes a multi-line
example, such as git-branch.

---
This one may want some consideration, because it involves changing how
git interacts with asciidoc in order to make up for how an older version
of docbook-xsl is broken. Clear?

What version of docbook-xsl are people who make git manpages using? If
it's not 1.69, the manpages (at least, those with multi-line examples)
display incorrectly. Many current popular distributions seem to be using
version 1.68.

http://www.kernel.org/pub/software/scm/git/RPMS/x86_64/git-core-1.2.4-1.x86_64.rpm

ftp://ftp.kddlabs.co.jp/pub/Linux/packages/fedora/extras/4/i386/git-core-1.2.4-1.fc4.i386.rpm

(found on pbone, with "redhat/" removed from url; for Fedora 4)

The 1.2.1 packages linked from http://packages.debian.org/unstable/devel/git-core

all show the errors.

ftp://ftp.kddlabs.co.jp/pub/Linux/packages/fedora/extras/development/i386/git-core-1.2.4-1.fc5.i386.rpm

(found on pbone, with "redhat/" removed from the url; for Fedora Other,
presumably 5)

is correct.

Clearly the *right* solution is for binary builders to update their
toolchains. Maybe leaving this as-is will be an impetus for them to do so.

Below is a not-right workaround which allows the git manpages render
correctly when built by someone with an old docbook-xsl package.

If this is acceptable, all well and good. If not, I'll contact the package
builders and invite them to upgrade or patch before building new packages.


 Documentation/asciidoc.conf |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

1885a1ac69eabd6fa882f4464d3c66303d707566
diff --git a/Documentation/asciidoc.conf b/Documentation/asciidoc.conf
index fa0877d..37e9ada 100644
--- a/Documentation/asciidoc.conf
+++ b/Documentation/asciidoc.conf
@@ -23,4 +23,11 @@ ifdef::backend-xhtml11[]
 <a href="{target}.html">{target}{0?({0})}</a>
 endif::backend-xhtml11[]
 
+# "unbreak" docbook-xsl v1.68 for manpages. v1.69 works with or without this.
+[listingblock]
+<example><title>{title}</title>
+<literallayout>
+|
+</literallayout>
+{title#}</example>
 
-- 
1.2.GIT

-- 
Francis Daly        francis@daoine.org