merge: eliminate nodes from action list
- eliminate my and other from merge and copy
- eliminate node from get
- use mctx for get
- fix bug flag = a[2:]
- pass mctx to recordupdates
- use new filectx.size in recordupdates
321
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
sub/b not present
sub not present