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ui: avoid mutable default arguments I almost introduced a bug around this code by accidentally mutating a default argument. There's no reason for these to exist. It is OK to not assign {} to environ in ui.system because util.system knows how to deal with that.
author Siddharth Agarwal <sid0@fb.com>
date Tue, 22 Sep 2015 16:56:34 -0700
parents f91e5630ce7e
children
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When Mercurial accepts more than one revision, they may be specified
individually, or provided as a topologically continuous range,
separated by the ":" character.

The syntax of range notation is [BEGIN]:[END], where BEGIN and END are
revision identifiers. Both BEGIN and END are optional. If BEGIN is not
specified, it defaults to revision number 0. If END is not specified,
it defaults to the tip. The range ":" thus means "all revisions".

If BEGIN is greater than END, revisions are treated in reverse order.

A range acts as a closed interval. This means that a range of 3:5
gives 3, 4 and 5. Similarly, a range of 9:6 gives 9, 8, 7, and 6.