Add comment to tools/git-external-diff.

Bruce Momjian <bruce@momjian.us>

Commit: dae1e5546cdff98d85215a461f108f71fd254441
Author: Bruce Momjian <bruce@momjian.us>
Date: 2011-03-11T10:06:31Z
Releases: 9.1.0
Add comment to tools/git-external-diff.

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src/tools/git-external-diff modified +3 −1