test-help: improve test coverage

Adds a test for using the help option with the version option.

Extends test coverage of commands.help_ by another 2 lines.

tests/test-help

@@ -9,6 +9,10 b' echo %% test short command list with ver'
 hg -v help shortlist | sed 's/[(]version [^)]*[)]/(version xxx)/'
 
 hg add -h
+
+echo %% test help option with version option
+hg add -h --version | sed 's/[(]version [^)]*[)]/(version xxx)/'
+
 hg add --skjdfks
 hg help diff
 hg help status

tests/test-help.out

@@ -250,6 +250,31 b' options:'
  -n --dry-run  do not perform actions, just print output
 
 use "hg -v help add" to show global options
+%% test help option with version option
+Mercurial Distributed SCM (version xxx)
+
+Copyright (C) 2005-2009 Matt Mackall <[e-mail]> and others
+This is free software; see the source for copying conditions. There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+hg add [OPTION]... [FILE]...
+
+add the specified files on the next commit
+
+    Schedule files to be version controlled and added to the repository.
+
+    The files will be added to the repository at the next commit. To undo an
+    add before that, see hg forget.
+
+    If no names are given, add all files to the repository.
+
+options:
+
+ -I --include  include names matching the given patterns
+ -X --exclude  exclude names matching the given patterns
+ -n --dry-run  do not perform actions, just print output
+
+use "hg -v help add" to show global options
 hg add: option --skjdfks not recognized
 hg add [OPTION]... [FILE]...