linelog: optimize replacelines
The optimization to avoid calling `annotate` inside `replacelines` is significant
for practical use patterns.
Before this patch:
hg perflinelogedits
! wall 6.778478 comb 6.710000 user 6.700000 sys 0.010000 (best of 3)
After this patch:
hg perflinelogedits
! wall 0.136573 comb 0.140000 user 0.130000 sys 0.010000 (best of 63)
Differential Revision: https://phab.mercurial-scm.org/D4150
{
// 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)
}