big help upgrades

- short descriptions for command list
  - argument descriptions
  - render argument list on detailed help page

commands/message/search/wolfram-alpha.js

@@ -28,6 +28,7 @@ module.exports = {
   aliases: ['wa', 'wolfram-alpha'],
   metadata: {
     description: 'Computes a query using Wolfram|Alpha.',
+    description_short: 'Compute Wolfram|Alpha queries',
     examples: ['wa 1+1'],
     category: 'search',
     usage: 'wolframalpha <query>'