tests/test-check-pyflakes.t

sparse: --include 'dir1/dir2' should not include 'dir1/*'

In 2015 there was a workaround added (f39bace2d6cad32907c0d7961b3c0dbd64a1b7ad)
to sparse in the hg-experimental repo. That workaround:
a) no longer seems to be needed, since its testcase passes even with the code
   removed, and
b) caused a new problem: --include 'dir1/dir2' ended up including dir1/*
   too. (--include 'glob:dir1/dir2' is a user-level workaround.)

Remove the offending code, and add a testcase for situation B.

#require test-repo pyflakes hg10

  $ . "$TESTDIR/helpers-testrepo.sh"

run pyflakes on all tracked files ending in .py or without a file ending
(skipping binary file random-seed)

  $ cat > test.py <<EOF
  > print(undefinedname)
  > EOF
  $ pyflakes test.py 2>/dev/null | "$TESTDIR/filterpyflakes.py"
  test.py:1: undefined name 'undefinedname'
  
  $ cd "`dirname "$TESTDIR"`"

  $ testrepohg locate 'set:**.py or grep("^#!.*python")' \
  > -X hgext/fsmonitor/pywatchman \
  > -X mercurial/pycompat.py -X contrib/python-zstandard \
  > 2>/dev/null \
  > | xargs pyflakes 2>/dev/null | "$TESTDIR/filterpyflakes.py"