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There were some missing newlines in the macro expansions for shared
documentation that made the action and action_foreach docs look
wrong.

clang-format also changed the way the macros are defined.

Change-Id: Id32ac1f625db86008268c1692eed970f0ae59c10
Reviewed-on: https://chromium-review.googlesource.com/1057890Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Brett Wilson <brettw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#558749}