Small typos in completions

[23maverick23]

• fix the space at the end after double quote
  { "trigger": "date\tJekyll", "contents": "date:'$1'"},
• fix key to content, and page.content to title
  { "trigger": "page.title\tJekyll", "titles": "page.content" },
• add content as an available item
• remove .$1 from global variables