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/rustfmt.py b/rustfmt.py
index aae33a1..65246ae 100755
--- a/rustfmt.py
+++ b/rustfmt.py
@@ -15,56 +15,56 @@
 
 
 class NotFoundError(Exception):
-  """A file could not be found."""
-
-  def __init__(self, e):
-    Exception.__init__(
-        self, 'Problem while looking for rustfmt in Chromium source tree:\n'
-        '%s' % e)
+    """A file could not be found."""
+    def __init__(self, e):
+        Exception.__init__(
+            self, 'Problem while looking for rustfmt in Chromium source tree:\n'
+            '%s' % e)
 
 
 def FindRustfmtToolInChromiumTree():
-  """Return a path to the rustfmt executable, or die trying."""
-  chromium_src_path = gclient_paths.GetPrimarySolutionPath()
-  if not chromium_src_path:
-    raise NotFoundError(
-        'Could not find checkout in any parent of the current path.\n'
-        'Set CHROMIUM_BUILDTOOLS_PATH to use outside of a chromium checkout.')
+    """Return a path to the rustfmt executable, or die trying."""
+    chromium_src_path = gclient_paths.GetPrimarySolutionPath()
+    if not chromium_src_path:
+        raise NotFoundError(
+            'Could not find checkout in any parent of the current path.\n'
+            'Set CHROMIUM_BUILDTOOLS_PATH to use outside of a chromium '
+            'checkout.')
 
-  tool_path = os.path.join(chromium_src_path, 'third_party', 'rust-toolchain',
-                           'bin', 'rustfmt' + gclient_paths.GetExeSuffix())
-  if not os.path.exists(tool_path):
-    raise NotFoundError('File does not exist: %s' % tool_path)
-  return tool_path
+    tool_path = os.path.join(chromium_src_path, 'third_party', 'rust-toolchain',
+                             'bin', 'rustfmt' + gclient_paths.GetExeSuffix())
+    if not os.path.exists(tool_path):
+        raise NotFoundError('File does not exist: %s' % tool_path)
+    return tool_path
 
 
 def IsRustfmtSupported():
-  try:
-    FindRustfmtToolInChromiumTree()
-    return True
-  except NotFoundError:
-    return False
+    try:
+        FindRustfmtToolInChromiumTree()
+        return True
+    except NotFoundError:
+        return False
 
 
 def main(args):
-  try:
-    tool = FindRustfmtToolInChromiumTree()
-  except NotFoundError as e:
-    sys.stderr.write("%s\n" % str(e))
-    return 1
+    try:
+        tool = FindRustfmtToolInChromiumTree()
+    except NotFoundError as e:
+        sys.stderr.write("%s\n" % str(e))
+        return 1
 
-  # Add some visibility to --help showing where the tool lives, since this
-  # redirection can be a little opaque.
-  help_syntax = ('-h', '--help', '-help', '-help-list', '--help-list')
-  if any(match in args for match in help_syntax):
-    print('\nDepot tools redirects you to the rustfmt at:\n    %s\n' % tool)
+    # Add some visibility to --help showing where the tool lives, since this
+    # redirection can be a little opaque.
+    help_syntax = ('-h', '--help', '-help', '-help-list', '--help-list')
+    if any(match in args for match in help_syntax):
+        print('\nDepot tools redirects you to the rustfmt at:\n    %s\n' % tool)
 
-  return subprocess.call([tool] + args)
+    return subprocess.call([tool] + args)
 
 
 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)