Repository status documentation.

doc/utils.md

@@ -180,6 +180,16 @@ repository returning one or two values based on ```mode``` given:
 * ```#:output``` - returns the output lines (default)
 * ```#:exit+output``` - returns both exit code and output lines
 
+    (git-status repo)
+
+* ```repo``` - git repository
+
+Returns a dictionary with the following keys:
+
+* ```'modified``` - list of modified files
+* ```'untracked``` - list of untracked files
+* ```'unknown``` - list of files with unknown status
+
 ### IO
 
     (import util-io)