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$ rm -rf a
$ hg init a
$ cd a
$ echo a > a
$ hg ci -Am0
adding a
$ hg tag t1 # 1
$ hg tag --remove t1 # 2
$ hg co 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg tag -f -r0 t1
$ hg tags
tip 3:a49829c4fc11
t1 0:f7b1eb17ad24
Ensure that the username access fails gracefully if assumptions about the
environment made by python do not hold.
#if windows
>>> import os
>>> from mercurial import util
>>> os.environ.pop('LOGNAME', None) and None
>>> os.environ.pop('USER', None) and None
>>> os.environ.pop('LNAME', None) and None
>>> os.environ.pop('USERNAME', None) and None
>>> print(util.username())
None
#endif
$ cd ..
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