revsetbenchmark: add revset with lazyset subtraction
The added revset is used by obsolescence and currently results in
recursion in __contains__ between 2 lazysets. We should have
coverage of this revset.
--- a/contrib/revsetbenchmarks.txt Sat Aug 30 11:57:46 2014 +0200
+++ b/contrib/revsetbenchmarks.txt Sat Aug 30 15:17:37 2014 +0200
@@ -22,3 +22,4 @@
:10000 and draft()
max(::(tip~20) - obsolete())
roots((0:tip)::)
+(not public() - obsolete())