Fix grails plugin

Fix problem with "basename" command error "extra operand" (do not work with array)

plugins/grails/grails.plugin.zsh

@@ -24,17 +24,23 @@ _enumerateGrailsScripts() {
         return
     fi
     
-    # - Strip the path
-    # - Remove all scripts with a leading '_'
-    # - PackagePlugin_.groovy -> PackagePlugin
-    # - PackagePlugin         -> Package-Plugin
-    # - Package-Plugin        -> package-plugin
-    basename $files                             \
-        | sed -E  -e 's/^_?([^_]+)_?.groovy/\1/'\
-                  -e 's/([a-z])([A-Z])/\1-\2/g' \
-        | tr "[:upper:]" "[:lower:]"            \
-        | sort                                  \
-        | uniq
+    scripts=()
+    for file in $files
+    do
+        # - Strip the path
+        # - Remove all scripts with a leading '_'
+        # - PackagePlugin_.groovy -> PackagePlugin
+        # - PackagePlugin         -> Package-Plugin
+        # - Package-Plugin        -> package-plugin
+        command=$(basename $file                              \
+            | sed -E  -e 's/^_?([^_]+)_?.groovy/\1/'\
+                      -e 's/([a-z])([A-Z])/\1-\2/g' \
+            | tr "[:upper:]" "[:lower:]"            \
+            | sort                                  \
+            | uniq)
+        scripts+=($command)
+    done
+    echo $scripts
 }
  
 _grails() {