Unified #! paths for python scripts and removed them for test modules.

tests/coverage.py

@@ -1,4 +1,4 b''
-#!/usr/bin/python
+#!/usr/bin/env python
 #
 #             Perforce Defect Tracking Integration Project
 #              <http://www.ravenbrook.com/project/p4dti/>

tests/md5sum.py

@@ -1,4 +1,4 b''
-#! /usr/bin/env python
+#!/usr/bin/env python
 #
 # Based on python's Tools/scripts/md5sum.py
 #

tests/test-doctest.py

@@ -1,6 +1,3 b''
-#!/usr/bin/env python
-#
-
 import doctest
 
 import mercurial.changelog

tests/test-trusted.py

@@ -1,4 +1,3 b''
-#!/usr/bin/env python
 # Since it's not easy to write a test that portably deals
 # with files from different users/groups, we cheat a bit by
 # monkey-patching some functions in the util module