Add extra line to error message for clarification.
diff --git a/gitflow-sh-setup b/gitflow-sh-setup
index f24025d..2facfe1 100755
--- a/gitflow-sh-setup
+++ b/gitflow-sh-setup
@@ -53,7 +53,7 @@
 gitflow_require_branch_absent() {
 	echo "$ALL_BRANCHES" | grep "^$1\$" 2>/dev/null >/dev/null
 	if [ $? -eq 0 ]; then
-		die "Branch '$1' already exists."
+		die "Branch '$1' already exists. Pick another name."
 	fi
 }