use 'x is None' instead of 'x == None'
The built-in None object is a singleton and it is therefore safe to
compare memory addresses with is. It is also faster, how much depends
on the object being compared. For a simple type like str I get:
| s = "foo" | s = None
----------+-----------+----------
s == None | 0.25 usec | 0.21 usec
s is None | 0.17 usec | 0.17 usec
created new head
merging baz and foo to baz
1 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
merging foo and baz to baz
1 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
created new head
initializing destination new repository
scanning source...
sorting...
converting...
5 add foo bar
4 change foo
3 make bar and baz copies of foo
2 merge local copy
1 merge remote copy
0 mark baz executable
comparing with ../orig
searching for changes
no changes found
% init broken repository
created new head
% break it
initializing destination fixed repository
scanning source...
sorting...
converting...
4 init
ignoring: data/b.i@1e88685f5dde: no match found
3 changebagain
2 changeall
1 merge
0 moveb
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
3 files, 5 changesets, 5 total revisions
% manifest -r 0
a
% manifest -r tip
a
c
d