Merge branch 'br3'
Revert "Merge branch 'br3'"

This reverts commit 8df611130bc2b03f12c2c658fa24e7cd928e309b, reversing
changes made to 03d88a55f57047bf3ec2085c05d23805a87fda7e.
a=0
a=1
a=1 Merge branch 'br1'
a=2
a=2 Merge branch 'br2'
Revert "a=1 Merge branch 'br1'"

This reverts commit ef86494a0e67ccae7a2943d26bcd590f6dabff75, reversing
changes made to cc81b21d6c2584b22e4216f17b2b8d9c3cb86a8c.

Conflicts:
	test
c1
c2
c3