Emacs's quail functionality with (set-input-method "TeX") is great for typesetting mathematical notes in plain text. It even has completions, but, well... After \su<TAB> I get

Possible completion and corresponding characters are:
 \su: -
  \sub: -
       \subs: -
       \subse: -
          \subset:(1/1) 1.?
   \suc: -
     \succ:(1/1) 1.?
       \succa: -
          \succap: -
       \succc: -
          \succcu: -
       \succe: -
          \succeq:(1/1) 1.?
       \succn: -
          \succna: -
          \succns: -
       \succs: -
          \succsi: -
   \sum:(1/1) 1.?
   \sup: -
     \sups: -
       \supse: -
          \supset:(1/1) 1.?
   \sur: -
     \surd:(1/1) 1.v

Is there some possibility to make the completion output less verbose, showing only the full completions rather than the full paths?