Remove whitespaces

lib/noozoid/config.rb

@@ -1,9 +1,10 @@
+# frozen_string_literal: true
 
 module Noozoid
   module Config
     HELP_KEYS = [
       [:nav_parent,   'Navigate to parent'],
-      [:nav_child,   'Navigate to child' ],
+      [:nav_child,    'Navigate to child'],
       [:nav_next,     'Navigate to next sibling'],
       [:nav_previous, 'Navigate to previous sibling'],
       [:nav_root,     'Navigate to tree root'],
@@ -14,7 +15,7 @@ module Noozoid
       [:node_none,    ''],
       [:main_help,    'Show this help'],
       [:main_quit,    'Exit program']
-    ]
+    ].freeze
 
     DEFAULT_KEYS = {
       nav_parent: 'LEFT',
@@ -29,6 +30,6 @@ module Noozoid
       node_none: '',
       main_quit: 'q',
       main_help: '?'
-    }
+    }.freeze
   end
 end