Update usage docs and changelog.
diff --git a/git-flow-feature b/git-flow-feature
index 2133330..9da4b0b 100644
--- a/git-flow-feature
+++ b/git-flow-feature
@@ -44,7 +44,7 @@
 usage() {
 	echo "usage: git flow feature [list] [-v]"
 	echo "       git flow feature start [-F] <name> [<base>]"
-	echo "       git flow feature finish [-rFk] <name|nameprefix>"
+	echo "       git flow feature finish [-rFk] [<name|nameprefix>]"
 	echo "       git flow feature publish <name>"
 	echo "       git flow feature track <name>"
 	echo "       git flow feature diff [<name|nameprefix>]"