chg: ignore already closed fds when cleaning up
This should fix this error we see in the CI from time to time:
```
--- /tmp/mercurial-ci/tests/test-chg.t
+++ /tmp/mercurial-ci/tests/test-chg.t.err
@@ -187,6 +187,26 @@
$ chg bulkwrite --pager=on --color no --config ui.formatted=True
paged! 'going to write massive data\n'
killed! (?)
+ Traceback (most recent call last):
+ File "/tmp/hgtests._uvojvqb/install/lib/python/mercurial/commandserver.py", line 509, in _serverequest
+ sv.cleanup()
+ File "/tmp/hgtests._uvojvqb/install/lib/python/mercurial/chgserver.py", line 382, in cleanup
+ self._restoreio()
+ File "/tmp/hgtests._uvojvqb/install/lib/python/mercurial/chgserver.py", line 461, in _restoreio
+ os.close(fd)
+ OSError: [Errno 9] Bad file descriptor
+ Traceback (most recent call last):
+ File "/tmp/hgtests._uvojvqb/install/lib/python/mercurial/commandserver.py", line 693, in _acceptnewconnection
+ self._runworker(conn)
+ File "/tmp/hgtests._uvojvqb/install/lib/python/mercurial/commandserver.py", line 744, in _runworker
+ prereposetups=[self._reposetup],
+ File "/tmp/hgtests._uvojvqb/install/lib/python/mercurial/commandserver.py", line 509, in _serverequest
+ sv.cleanup()
+ File "/tmp/hgtests._uvojvqb/install/lib/python/mercurial/chgserver.py", line 382, in cleanup
+ self._restoreio()
+ File "/tmp/hgtests._uvojvqb/install/lib/python/mercurial/chgserver.py", line 461, in _restoreio
+ os.close(fd)
+ OSError: [Errno 9] Bad file descriptor
[255]
```
{
// Enforcing
"eqeqeq" : true, // true: Require triple equals (===) for comparison
"forin" : true, // true: Require filtering for..in loops with obj.hasOwnProperty()
"freeze" : true, // true: prohibits overwriting prototypes of native objects such as Array, Date etc.
"nonbsp" : true, // true: Prohibit "non-breaking whitespace" characters.
"undef" : true, // true: Require all non-global variables to be declared (prevents global leaks)
// Environments
"browser" : true // Web Browser (window, document, etc)
}