cros lint: check the indentation level of section arguments

Sometimes the indentation of things like "Args:" is incorrect.
Add a linter check for it and fix up all the existing errors.

BUG=chromium:485005
TEST=`cros lint` on all files pass, and catches some bad cases

Change-Id: I79ea60d1e07c40d9283284bdaebfcda5af4e6246
Reviewed-on: https://chromium-review.googlesource.com/269642
Trybot-Ready: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/parallel_emerge.py b/scripts/parallel_emerge.py
index 689d3a2..c1cb2be 100644
--- a/scripts/parallel_emerge.py
+++ b/scripts/parallel_emerge.py
@@ -534,8 +534,8 @@
     """Print the deps we have seen in the emerge output.
 
     Args:
-     deps: Dependency tree structure.
-     depth: Allows printing the tree recursively, with indentation.
+      deps: Dependency tree structure.
+      depth: Allows printing the tree recursively, with indentation.
     """
     for entry in sorted(deps):
       action = deps[entry]["action"]