Fix typo: an -> a

Thanks to Vanuan on github.

diff --git a/git-subtree.txt b/git-subtree.txt
index dbcba31346793d897dcecb274e578cefb8cbd92c..a30293d60767d7d83cd401b274ef24828a1a2e0b 100644 (file)
--- a/git-subtree.txt
+++ b/git-subtree.txt
@@ -19,7 +19,7 @@ SYNOPSIS
 
 DESCRIPTION
 -----------
-git subtree allows you to include an subproject in your
+git subtree allows you to include a subproject in your
 own repository as a subdirectory, optionally including the
 subproject's entire history. For example, you could
 include the source code for a library as a subdirectory of your