Smarter handling of revlog key errors
Use RevlogError for reporting exceptions
Catch and report RevlogError exceptions at the command parser
#!/bin/sh
hg
hg -q
hg help
hg -q help
hg add -h
hg add --skjdfks
hg help diff
hg help status
hg -q help status
hg help foo
hg skjdfks
exit 0