This is an automated CL created by the recipe roller. This CL rolls recipe
changes from upstream projects (e.g. depot_tools) into downstream projects
(e.g. tools/build).

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recipe_engine:
  https://crrev.com/1c4786ae10b3b4f17c2893cea345725c4a8cd135 [step|docs] Improve the nest docstring a bit. (iannucci@chromium.org)

TBR=martiniss@chromium.org,phajdan.jr@chromium.org

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Review-Url: https://codereview.chromium.org/2673583004