Fix non-empty $CDPATH causing failed tests.
If CDPATH contains '.', every cd command prints the target path,
which causes additional output in tests and makes them fail.
syntax: glob
*.elc
*.orig
*.rej
*~
*.mergebackup
*.o
*.so
*.pyd
*.pyc
*.swp
*.prof
tests/.coverage*
tests/annotated
tests/*.err
build
contrib/hgsh/hgsh
dist
doc/*.[0-9]
doc/*.[0-9].gendoc.txt
doc/*.[0-9].{x,ht}ml
MANIFEST
patches
mercurial/__version__.py
Output/Mercurial-*.exe
.DS_Store
tags
cscope.*
syntax: regexp
^\.pc/
^\.(pydev)?project