Deprecate ExPex about tex HOT 1 OPEN

More gripes:

• ExPex treats \label{} as non-space; e.g.,

  \ex\label{main}
    Hello
  \xe

  Gets an ugly extra space at the beginning; to get this to render properly (as if there was no \label{}), it should be:

  \ex\label{main}%
    Hello
  \xe

• Why have different commands \ex vs. \pex for examples-without-subparts and examples-with-subparts? Other example typesetting libraries disambiguate / automatically adjust, no problem. Don't Make Me Think.

• The texdoc expex manual is 82 pages long. It's. not. that. hard.

• There doesn't seem to be a way to group together root-level examples in order to discourage LaTeX from putting a page break in between.

• \pex[labeltype=roman] is broken; the subexamples start numbering from (ii). Other labeltype values work just fine, starting at 1, a, etc.

  • Copy&pasting example (22) from the documentation into a brand new empty \documentclass{article} document produces a different result than is shown there:
    
  • This is with version 5/25/2017 v5.1b ExPex linguistics example formatter (JF) (which has been out for a while)

from tex.