Fix release.py to allow uncommented initial _VERSION.

I was in favor of always leaving _VERSION commented in the trunk,
since released branches should fork off the trunk:

  trunkA -> trunkB -> trunkC -> trunkD
   `-> 1.0.0           `-> 1.1.0
        `-> 1.0.1           `-> 1.1.1

But that doesn't seem to have been how things have worked out in BE.
In any case, you will need to release on top of a previous release
(e.g. 1.0.1 on top of 1.0.0 in my above example), so we cannot depend
on an initial comment character before _VERSION.

1 files changed, 1 insertions, 1 deletions

diff --git a/release.py b/release.py
index 0e144d8..7464871 100755
--- a/release.py
+++ b/release.py
@@ -66,7 +66,7 @@ def pending_changes():
 
 def set_release_version(tag):
     print "set libbe.version._VERSION = '%s'" % tag
-    invoke(['sed', '-i', "s/^# *_VERSION *=.*/_VERSION = '%s'/" % tag,
+    invoke(['sed', '-i', "s/^[# ]*_VERSION *=.*/_VERSION = '%s'/" % tag,
             os.path.join('libbe', 'version.py')])
 
 def remove_makefile_libbe_version_dependencies(filename):