repo: Fix blank line issues reported by flake8

Change-Id: I62633e71a36b2acbd09e205447a02159dd334896
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/254694
Reviewed-by: Mike Frysinger <vapier@google.com>
Tested-by: David Pursehouse <dpursehouse@collab.net>

repo

@@ -205,6 +205,7 @@ gpg_dir = os.path.join(home_dot_repo, 'gnupg')
 extra_args = []
 init_optparse = optparse.OptionParser(usage="repo init -u url [options]")
 
+
 def _InitParser():
   """Setup the init subcommand parser."""
   # Logging.
@@ -284,6 +285,7 @@ def _GitcInitOptions(init_optparse_arg):
                dest='gitc_client',
                help='The name of the gitc_client instance to create or modify.')
 
+
 _gitc_manifest_dir = None
 
 
@@ -424,6 +426,7 @@ def _Init(args, gitc_init=False):
 GitVersion = collections.namedtuple(
     'GitVersion', ('major', 'minor', 'micro', 'full'))
 
+
 def ParseGitVersion(ver_str=None):
   if ver_str is None:
     # Load the version ourselves.