Hlint improvements

[KommuSoft]

After running hlint some suggestions showed up. The following suggestions have been ignored:

Examples/multirow.hs:28:5: Suggestion: Reduce duplication
Found:
  mempty & "Column g2b" <> lnbk
  mempty & "Column g2c" <> lnbk
  mempty & "Column g2d" <> lnbk
  hline
  
Why not:
  Combine with Examples/multirow.hs:45:5

Text/LaTeX/Base/Class.hs:56:26: Suggestion: Use const
Found:
  \ _ -> l
Why not:
  const l

Text/LaTeX/Base/Commands.hs:1167:1: Suggestion: Use camelCase
Found:
  hatex_version = ...
Why not:
  hatexVersion = ...

3 hints

(the const was already merged into the master)

[leftaroundabout]

[Char] (or even Set Char) expresses the intend better.

[KommuSoft]

Agreed, perhaps it is better to move nottext out of the text function, and use a Set instead. Updated.

[leftaroundabout]

Yeah. Data.Set is kind of overkill, but whatever.