switch to 4 space indent

Leave the recipes/ code at 2 space to match the rest of the recipes
project in other repos.

Reformatted using:
files=( $(
	git ls-tree -r --name-only HEAD | \
		grep -Ev -e '^(third_party|recipes)/' | \
		grep '\.py$';
	git grep -l '#!/usr/bin/env.*python' | grep -v '\.py$'
) )
parallel ./yapf -i -- "${files[@]}"
~/chromiumos/chromite/contrib/reflow_overlong_comments "${files[@]}"

The files that still had strings that were too long were manually
reformatted because they were easy and only a few issues.
autoninja.py
clang_format.py
download_from_google_storage.py
fix_encoding.py
gclient_utils.py
git_cache.py
git_common.py
git_map_branches.py
git_reparent_branch.py
gn.py
my_activity.py
owners_finder.py
presubmit_canned_checks.py
reclient_helper.py
reclientreport.py
roll_dep.py
rustfmt.py
siso.py
split_cl.py
subcommand.py
subprocess2.py
swift_format.py
upload_to_google_storage.py

These files still had lines (strings) that were too long, so the pylint
warnings were suppressed with a TODO.
auth.py
gclient.py
gclient_eval.py
gclient_paths.py
gclient_scm.py
gerrit_util.py
git_cl.py
presubmit_canned_checks.py
presubmit_support.py
scm.py

Change-Id: Ia6535c4f2c48d46b589ec1e791dde6c6b2ea858f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4836379
Commit-Queue: Josip Sokcevic <sokcevic@chromium.org>
Auto-Submit: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>
diff --git a/git_freezer.py b/git_freezer.py
index e4b1d8b..cf8ec44 100755
--- a/git_freezer.py
+++ b/git_freezer.py
@@ -12,28 +12,28 @@
 
 
 def CMDfreeze(parser, args):
-  """Freeze a branch's changes, excluding unstaged gitlinks changes."""
-  parser.parse_args(args)
-  return freeze()
+    """Freeze a branch's changes, excluding unstaged gitlinks changes."""
+    parser.parse_args(args)
+    return freeze()
 
 
 def CMDthaw(parser, args):
-  """Returns a frozen branch to the state before it was frozen."""
-  parser.parse_args(args)
-  return thaw()
+    """Returns a frozen branch to the state before it was frozen."""
+    parser.parse_args(args)
+    return thaw()
 
 
 def main(args):
-  dispatcher = subcommand.CommandDispatcher(__name__)
-  ret = dispatcher.execute(optparse.OptionParser(), args)
-  if ret:
-    print(ret)
-  return 0
+    dispatcher = subcommand.CommandDispatcher(__name__)
+    ret = dispatcher.execute(optparse.OptionParser(), args)
+    if ret:
+        print(ret)
+    return 0
 
 
 if __name__ == '__main__':
-  try:
-    sys.exit(main(sys.argv[1:]))
-  except KeyboardInterrupt:
-    sys.stderr.write('interrupted\n')
-    sys.exit(1)
+    try:
+        sys.exit(main(sys.argv[1:]))
+    except KeyboardInterrupt:
+        sys.stderr.write('interrupted\n')
+        sys.exit(1)