cros lint: catch leading whitespace in docstring

BUG=None
TEST=ran cros lint on chromite files

Change-Id: I452c9be885b04a91f7fb46226883697b81480260
Reviewed-on: https://chromium-review.googlesource.com/216696
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/parallel_emerge.py b/scripts/parallel_emerge.py
index d196256..e893c5d 100644
--- a/scripts/parallel_emerge.py
+++ b/scripts/parallel_emerge.py
@@ -1801,7 +1801,7 @@
 
 
 def get_db(config, root):
-  """ Return the dbapi.
+  """Return the dbapi.
   Handles both portage 2.1.11 and 2.2.10 (where mydbapi has been removed).
 
   TODO(bsimonnet): Remove this once portage has been uprevd.