|  | ZHANG, Ruda | March 23, 2018: 
          Global remove trailing whitespaces
          [2b7ff90] | 
      
        |  | Ruda Zhang | June 26, 2016: 
          one sentence per line
          [e15360a] | 
      
        |  | Ruda Zhang | June 26, 2016: 
          add category tag to wiki pages
          [a9b356c] | 
      
        |  | Ruda Zhang | June 26, 2016: 
          Use internal link for wiki pages.
          [22daaba] | 
      
        |  | Ruda Zhang | June 26, 2016: 
          use canonical filename and no internal H1
          [eeca8ff] |