Fix flake8 E251 unexpected spaces around keyword / parameter equals

Fixed automatically with autopep8:

  git ls-files | grep py$ | xargs autopep8 --in-place --select E251

Change-Id: I58009e1c8c91c39745d559ac919be331d4cd9e77
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/254598
Tested-by: David Pursehouse <dpursehouse@collab.net>
Reviewed-by: Mike Frysinger <vapier@google.com>

subcmds/selfupdate.py

@@ -59,5 +59,5 @@ need to be performed by an end-user.
 
       rp.bare_git.gc('--auto')
       _PostRepoFetch(rp,
-                     no_repo_verify = opt.no_repo_verify,
-                     verbose = True)
+                     no_repo_verify=opt.no_repo_verify,
+                     verbose=True)