Snippet diffs including lines that are exactly the same as previous

[erjenkins29]

(NOTE: very small issue....)

Setup: Code from commit d598 has a duplicated line. Submit a codemark in a previous commit. a different user commits a change (by removing the duplicated line). Then pull the changes locally.

Expected: a diff which does not make statements about lines that are exactly the same.

Actual: a diff which includes lines that are identical between commits as having been removed in the previous commit, and then added in the current commit.

[planteater]

Thanks for the report @erjenkins29 !