pager: remove quiet flag
With the pager running as a child process, exiting the pager doesn't
result in a broken pipe message. To distinguish the exit broken pipe code
from a mercurial abort we register the default action for SIGPIPE. This
results in a 141 exit code instead of a 255. On windows SIGPIPE doesn't
exists and a ValueError will be thrown.
hg debuginstall
$ hg debuginstall
Checking encoding (ascii)...
Checking installed modules (*mercurial)... (glob)
Checking templates (*mercurial?templates)... (glob)
Checking commit editor...
Checking username...
No problems detected
hg debuginstall with no username
$ HGUSER= hg debuginstall
Checking encoding (ascii)...
Checking installed modules (*mercurial)... (glob)
Checking templates (*mercurial?templates)... (glob)
Checking commit editor...
Checking username...
no username supplied (see "hg help config")
(specify a username in your configuration file)
1 problems detected, please check your install!
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