[issue2868] aliases should be ignored if the definition == '!'

[Idan Kamara]

New submission from Idan Kamara <idankk86 at gmail.com>:

When overriding an existing command, calling the existing command from the 
override causes an endless (process creation) loop.

Although not recommended by the docs, this can be useful, e.g.:

[alias]
qrefresh=!$HG --config alias.qrefresh=! $HG_ARGS && $HG commit --mq -q -Am 
'backup'

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assignedto: idank
messages: 16600
nosy: idank
priority: bug
status: unread
title: aliases should be ignored if the definition == '!'

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Mercurial issue tracker <bugs at mercurial.selenic.com>
<http://mercurial.selenic.com/bts/issue2868>
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