tests: change quoting pattern to match core's conventions This patch modifies two tests to match new quoting patterns used in core: (use "hg config --edit" to set your username) becomes (use 'hg config --edit' to set your username) and (use hg resolve and hg graft --continue) becomes (use 'hg resolve' and 'hg graft --continue')

test-drop.t
test-inhibit.t
test-simple4server.t
tests/test-simple4server-bundle2.t