trivial: use git-repo-config to detect if the test can be run on the repository

diff --git a/git-checkout.sh b/git-checkout.sh
index 4cf30e2c0529e90886e6edfd485cec67a278e224..36308d22c6a72b9ad53ced60bd3c70a2e17520b6 100755 (executable)
--- a/git-checkout.sh
+++ b/git-checkout.sh
@@ -1,9 +1,7 @@
 #!/bin/sh
-. git-sh-setup
 
-usage () {
-    die "usage: git checkout [-f] [-b <new_branch>] [<branch>] [<paths>...]"
-}
+USAGE='[-f] [-b <new_branch>] [<branch>] [<paths>...]'
+. git-sh-setup
 
 old=$(git-rev-parse HEAD)
 new=
@@ -118,7 +116,7 @@ else
 fi
 
 # 
-# Switch the HEAD pointer to the new branch if it we
+# Switch the HEAD pointer to the new branch if we
 # checked out a branch head, and remove any potential
 # old MERGE_HEAD's (subsequent commits will clearly not
 # be based on them, since we re-set the index)