fit tracks changes

jietigero · jietigero · commit 37406d0f00dc · 2016-05-08T18:16:21.000+08:00
diff --git a/readme.txt b/readme.txt
@@ -1,3 +1,4 @@
 Git is a distributed version control system.
 Git is free software distributed under the GPL.
 Git has a mutable index called stage.
+Git tracks changes.
