tests/test-check-interfaces.py.out

tests: show unusual error message for `hg log --style coal`

It turns out that we show the full path when the given style name
matches a subdirectory of `mercurial/templates/`.

Differential Revision: https://phab.mercurial-scm.org/D8803

public attribute not declared in interfaces: badpeer.badattribute
public attribute not declared in interfaces: badpeer.badmethod