Back out trusted hgrc change for now
Backed out changeset
494521a3f1425
Add support for diffstat in commit emails, and move diffstat from
patchbomb to patch
cat: default to working dir parent instead of tip
This introduces a defaultrev function that chooses
the working dir parent if a revision isn't specified,
and uses it in several places.
Avoid negative block sizes in lazyparser.
This fixes a bug introduced by changeset
baa3873eb387 .