kiss-maintainers: Fix bugs

contrib/kiss-maintainer

@@ -1,8 +1,12 @@
-#!/bin/sh -e
+#!/bin/sh -ef
 #
 # kiss-maintainer - find the maintainer of a package.
 
 kiss s "$1" >/dev/null && {
-    cd "$(kiss s "$1")"
-    git log . 2>/dev/null | grep -F Author: | sort -u
+    for repo in $(kiss s "$1"); do cd "$repo"
+        maintainers=$(git log . 2>/dev/null | grep -F Author: | sort -u)
+
+        [ "$maintainers" ] &&
+            printf '=> %s\n%s\n' "$PWD" "$maintainers"
+    done
 }