osutil: cleanups
- use tabs
- eliminate old-style function pointer calls
- eliminate weird scoping
- eliminate assignment-in-iff
- use !foo rather than foo == NULL
#!/bin/sh
hg init
echo a > a
hg ci -Am t
hg mv a b
hg ci -Am t1
hg debugrename b
hg mv b a
hg ci -Am t2
hg debugrename a
echo % test with --rev
hg debugrename --rev 1 b