Fix indentation issues reported by flake8

- E121 continuation line under-indented for hanging indent
- E122 continuation line missing indentation or outdented
- E125 continuation line with same indent as next logical line
- E126 continuation line over-indented for hanging indent
- E127 continuation line over-indented for visual indent
- E128 continuation line under-indented for visual indent
- E129 visually indented line with same indent as next logical line
- E131 continuation line unaligned for hanging indent

Fixed automatically with autopep8:

  git ls-files | grep py$ | xargs autopep8 --in-place \
    --select E121,E122,E125,E126,E127,E128,E129,E131

Change-Id: Ifd95fb8e6a1a4d6e9de187b5787d64a6326dd249
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/254605
Reviewed-by: Mike Frysinger <vapier@google.com>
Tested-by: David Pursehouse <dpursehouse@collab.net>

editor.py

@@ -57,7 +57,7 @@ class Editor(object):
 
     if os.getenv('TERM') == 'dumb':
       print(
-"""No editor specified in GIT_EDITOR, core.editor, VISUAL or EDITOR.
+          """No editor specified in GIT_EDITOR, core.editor, VISUAL or EDITOR.
 Tried to fall back to vi but terminal is dumb.  Please configure at
 least one of these before using this command.""", file=sys.stderr)
       sys.exit(1)
@@ -104,10 +104,10 @@ least one of these before using this command.""", file=sys.stderr)
         rc = subprocess.Popen(args, shell=shell).wait()
       except OSError as e:
         raise EditorError('editor failed, %s: %s %s'
-          % (str(e), editor, path))
+                          % (str(e), editor, path))
       if rc != 0:
         raise EditorError('editor failed with exit status %d: %s %s'
-          % (rc, editor, path))
+                          % (rc, editor, path))
 
       with open(path, mode='rb') as fd2:
         return fd2.read().decode('utf-8')