test-copy-move-merge.t: explicitly request changed version We're going to change the default for this in an upcoming patch, but in this instance we do want to continue picking the changed version.

match: add option to return line and lineno from readpattern This will be used to display the line and linenumber of ignorefile that matched an ignored file (issue4856).

dirstate: extract logic to compute the list of ignorefiles We are going to reuse this logic to improve debugignore in the next patches of the series.

dirstate: call the C implementation of nonnonormalentries when available Before this patch, we were using python code for computing the nonnormal dirstate entries. This patch makes us use the C implementation of the function when it is available. Using the nonnormal set in hgwatchman improves hg status performance. Below are the numbers for mozilla-central. with the changes: $ hg perfstatus ! wall 0.010632 comb 0.000000 user 0.000000 sys 0.000000 (best of 246) without the changes: $ hg perfstatus ! wall 0.036442 comb 0.030000 user 0.030000 sys 0.000000 (best of 100) On mozilla-central the improvement to hg status is ~20% (0.25s to 0.2s), on our big repos at Facebook, the win is ~40% (1.2s to 0.72s).