.gitignore: ignore 'git-subtree' as a build artifact

LukeShu · gitster · commit 4c996deb4af9 · 2021-04-28T16:46:30.000+09:00
Running `make -C contrib/subtree/ test` creates a `git-subtree` executable
in the root of the repo.  Add it to the .gitignore so that anyone hacking
on subtree won't have to deal with that noise.

Signed-off-by: Luke Shumaker &lt;lukeshu@datawire.io&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/.gitignore b/.gitignore
@@ -162,6 +162,7 @@
 /git-stripspace
 /git-submodule
 /git-submodule--helper
+/git-subtree
 /git-svn
 /git-switch
 /git-symbolic-ref
