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Several typos were landed in https://crrev.com/728635:
* hisotgrams -> histograms
* AddBackMisplacedHisotgrams -> AddBackMisplacedHistograms
* hsitogram_suffixes -> histogram_suffixes

There was also a recursive call to "FixMisplacedHisotgrams" that was
renamed in a previous patchset to AddBackMisplacedHistograms. This has
been updated to "AddBackMisplacedHistograms".

The test has been updated with a comment node inside
"<histogram-configuration>" to exercise this codepath. This has been
manually tested by ensuring
https://chromium-review.googlesource.com/c/chromium/src/+/1988857 can
successfully run "git cl format".

Bug: 1039447
Change-Id: I95097c0d4acd23301a7fad0d9d33521be405aa53
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1988375Reviewed-by: Ilya Sherman <isherman@chromium.org>
Commit-Queue: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#728726}