mailmap: Add comments to explain the use of the mailmap file (#4105)

seisman · yvonnefroehlich · web-flow · commit 823403e6a43b · 2025-09-21T00:13:12.000+08:00
Co-authored-by: Yvonne Fröhlich &lt;94163266+yvonnefroehlich@users.noreply.github.com&gt;
diff --git a/.mailmap b/.mailmap
@@ -1,3 +1,5 @@
+# Map author/committer names and/or email addresses for git.
+# Reference: https://git-scm.com/docs/gitmailmap
 Dongdong Tian <seisman.info@gmail.com>
 Dongdong Tian <seisman.info@gmail.com> <seisman@users.noreply.github.com>
 Jiayuan Yao <coreman.seism@gmail.com>

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,5 @@`
	`1`	`+# Map author/committer names and/or email addresses for git.`
	`2`	`+# Reference: https://git-scm.com/docs/gitmailmap`
`1`	`3`	`Dongdong Tian <seisman.info@gmail.com>`
`2`	`4`	`Dongdong Tian <seisman.info@gmail.com> <seisman@users.noreply.github.com>`
`3`	`5`	`Jiayuan Yao <coreman.seism@gmail.com>`