merge: rework iteration over mergeresult object in checkpathconflicts()
Instead of following pattern:
```
for f, (m, args, msg) in mresult.actions.items():
if m == mergestatemod.ACTION_*:
...
elif m == mergestatemod.ACTION_*:
...
....
```
We do:
```
for (f, args, msg) in mresult.getaction((mergestatemod.ACTION_*,)):
...
for (f, args, msg) in mresult.getaction((mergestatemod.ACTION_*,)):
...
....
```
This makes code bit easier to understand and prevent iterating over actions
which we don't need.
Differential Revision: https://phab.mercurial-scm.org/D8884
#!/bin/sh
# @ 3: 'move2'
# |
# o 2: 'move1'
# |
# | o 1: 'change'
# |/
# o 0: 'add'
hg init copies
cd copies
echo a > a
echo b > b
echo c > c
hg ci -Am add
echo a >> a
echo b >> b
echo c >> c
hg ci -m change
hg up -qC 0
hg cp a d
hg mv b e
hg mv c f
hg ci -m move1
hg mv e g
hg mv f c
hg ci -m move2
hg bundle -a ../renames.hg
cd ..