tests: allow "git version" test to pass on arbitrary git versions

Sometimes people run development versions of git.
On these versions, "git version" returns, for example:

git version 1.5.4.rc2.1105.gfc5f2

The test_it_executes_git_to_shell_and_returns_result
testcase was updated to accept these versions of git.

Signed-off-by: David Aguilar <davvid@gmail.com>

Author: davvid

test/git/test_git.py

@@ -24,7 +24,7 @@ def test_it_transforms_kwargs_into_git_command_arguments(self):
         assert_equal(["-s", "-t"], self.git.transform_kwargs(**{'s': True, 't': True}))
 
     def test_it_executes_git_to_shell_and_returns_result(self):
-        assert_match('^git version [\d\.]*$', self.git.execute(["git","version"]))
+        assert_match('^git version [\d\.]{2}.*$', self.git.execute(["git","version"]))
 
     def test_it_accepts_stdin(self):
         filename = fixture_path("cat_file_blob")