strip whitespace around '@' (required by ghc-9.0.2)
# Please enter the patch name in the first line, and
# optionally, a long description in the following lines.
#
# Lines starting with '#' will be ignored.
#
#
# Summary of selected changes:
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# M ./pappy/MemoAnalysis.hs -3 +3
# M ./pappy/PappyBasic.hs -2 +2
# M ./pappy/PappyParse.hs -2 +2
# M ./pappy/ReduceGrammar.hs -3 +3
# M ./pappy/SimplifyGrammar.hs -8 +8
# M ./pappy/WriteParser.hs -1 +1