Support different localized git messages

git2svn sometimes parses the stdout of git commands but if the locale is
not set to something like en_US it can't and fails with the following
error:

Running command: git branch --track "<branch>" "remotes/svn/<branch>"
fatal: No se puede configurar el rastreo de información; el punto de
partida 'remotes/svn/1.0' no es una rama.
********************************************************************
svn2git warning: Tracking remote SVN branches is deprecated.
In a future release local branches will be created without tracking.
If you must resync your branches, run: svn2git --rebase
********************************************************************
Running command: git checkout "<branch>"
error: pathspec '<branch>' did not match any file(s) known to git.
command failed:
...

A comparable error for 'git config' happened if a older version of
git (< 1.7.4) will be used.

It's never a good idea to parse messages from stdout in a special
language but this simple fix parse the messages in the same manner and
should support different languages.

Author: sagiru

lib/svn2git/migration.rb

@@ -357,7 +357,7 @@ def fix_branches
           # Our --rebase option obviates the need for read-only tracked remotes, however.  So, we'll
           # deprecate the old option, informing those relying on the old behavior that they should
           # use the newer --rebase otion.
-          if status =~ /Cannot setup tracking information/m
+          if status =~ /fatal:.+'#{branch}'.+/
             @cannot_setup_tracking_information = true
             run_command(Svn2Git::Migration.checkout_svn_branch(branch))
           else
@@ -476,7 +476,7 @@ def git_config_command
       if @git_config_command.nil?
         status = run_command('git config --local --get user.name', false)
 
-        @git_config_command = if status =~ /unknown option/m
+        @git_config_command = if status =~ /error: .+\s.+git config \[.+/m
                                 'git config'
                               else
                                 'git config --local'
@@ -488,4 +488,3 @@ def git_config_command
 
   end
 end
-