[Battery Current] Fix sphinx doc.

Fix doc string format for sphinx.

BUG=None
TEST=make doc and see the output result

Change-Id: I7de08e0f53983be4c8cf572b4b0dff470e62ee58
Reviewed-on: https://chromium-review.googlesource.com/322067
Commit-Ready: Hsu Wei-Cheng <mojahsu@chromium.org>
Tested-by: Hsu Wei-Cheng <mojahsu@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
1 file changed