Fix minor grammatical errors in various docs

Fixes a few minor grammatical and spelling errors in some of the
documentation.

Change-Id: I2126f2fafdb85e3436ff7c2a9676e467206bf814
Bug: 1230143
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3035503
Reviewed-by: Toby Huang <[email protected]>
Commit-Queue: Andrew Williams <[email protected]>
Cr-Commit-Position: refs/heads/master@{#902737}
diff --git a/docs/commit_checklist.md b/docs/commit_checklist.md
index f3e22a6..a3f6a8312 100644
--- a/docs/commit_checklist.md
+++ b/docs/commit_checklist.md
@@ -80,7 +80,7 @@
 device. Make sure you hit every code path you changed.
 
 Some testing tips:
-*   Use LOG(ERROR) << "debug print statement" to for debugging. You can find
+*   Use `LOG(ERROR) << "debug print statement"` for debugging. You can find
     the logs in /var/logs/chrome/ on the ChromeOS device.
 *   Use GDB for setting breakpoints while debugging.