Correct optimization from 3464f5e77f34; add a test.
If there are two (or more) heads that point to the same .hgtags
node, we can safely skip parsing the file in all but the last head.
(In 3464f5e77f34, we were parsing the file in the first head and
skipping all the others.)
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
changeset: 2:62ec0e86d1e5
tag: tip
parent: 0:567dde5e6e98
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: add empty3
changeset: 1:41ab7b321727
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: add empty2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
M empty2
b80de5d138758541c5f05265ad144ab9fa86d1db 644 empty1
b80de5d138758541c5f05265ad144ab9fa86d1db 644 empty2
b80de5d138758541c5f05265ad144ab9fa86d1db 644 empty3