Improvements and bugfixes to the depot_tools doc generation process.

docs/man1/git-nav-upstream.1

 '\" t
 .\"     Title: git-nav-upstream
 .\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
 .\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
 .\"      Date: 04/10/2014
 .\"    Manual: Chromium depot_tools Manual
 .\"    Source: depot_tools 1ce0237
 .\"  Language: English
 .\"
 .TH "GIT\-NAV\-UPSTREAM" "1" "04/10/2014" "depot_tools 1ce0237" "Chromium depot_tools Manual"
@@ skipping 56 matching lines @@
 
 You are in \*(Aqdetached HEAD\*(Aq state\&. You can look around, make experimental  \fB(1)\fR
 changes and commit them, and you can discard any commits you make in this
 state without impacting any branches by performing another checkout\&.
 
 If you want to create a new branch to retain commits you create, you may
 do so (now or later) by using \-b with the checkout command again\&. Example:
 
   git checkout \-b new_branch_name
 
-HEAD is now at 619ccc9\&.\&.\&. Make ReflectorImpl use mailboxes
+HEAD is now at beec6f4\&.\&.\&. Make ReflectorImpl use mailboxes
 \fB$ git map\-branches\fR
 \fBorigin/master *
 \fR  cool_feature
     subfeature
   fixit
     frozen_branch
 .fi
 .if n \{\
 .RE
 .\}
@@ skipping 19 matching lines @@
 \fBgit-map-branches\fR(1), \fBgit-nav-downstream\fR(1)
 .SH "CHROMIUM DEPOT_TOOLS"
 .sp
 Part of the chromium \fBdepot_tools\fR(7) suite\&. These tools are meant to assist with the development of chromium and related projects\&. Download the tools from \m[blue]\fBhere\fR\m[]\&\s-2\u[1]\d\s+2\&.
 .SH "NOTES"
 .IP " 1." 4
 here
 .RS 4
 \%https://chromium.googlesource.com/chromium/tools/depot_tools.git
 .RE