Fix the directory and revlog collision problem
This adds escaping for directory names so that directory foo.i doesn't
collide with the revision data for file foo.
+ mkdir t
+ cd t
+ hg init
+ echo This is file a1
+ hg add a
+ hg commit -m 'commit #0' -d '0 0'
+ echo This is file b1
+ hg add b
+ hg commit -m 'commit #1' -d '0 0'
+ rm b
+ hg update 0
+ echo This is file b2
+ hg add b
+ hg commit -m 'commit #2' -d '0 0'
+ cd ..
+ /bin/rm -rf t
+ mkdir t
+ cd t
+ hg init
+ echo This is file a1
+ hg add a
+ hg commit -m 'commit #0' -d '0 0'
+ echo This is file b1
+ hg add b
+ hg commit -m 'commit #1' -d '0 0'
+ rm b
+ hg update 0
+ echo This is file b2
+ hg commit -A -m 'commit #2' -d '0 0'
adding b
+ cd ..
+ /bin/rm -rf t
+ mkdir t
+ cd t
+ hg init
+ echo This is file a1
+ hg add a
+ hg commit -m 'commit #0' -d '0 0'
+ echo This is file b1
+ hg add b
+ hg commit -m 'commit #1' -d '0 0'
+ rm b
+ hg remove b
+ hg update 0
+ echo This is file b2
+ hg commit -A -m 'commit #2' -d '0 0'
adding b
+ cd ..
+ /bin/rm -rf t