exchange: check for remote refs to determine if we're cloning The exchange.pull wrapper function was checking whether any paths were configured yet as a proxy to determine whether we're doing the initial clone or a subsequent pull. Core hg @ bdae51a83dfb (released in 4.5) now sets the 'default' path on the ui object before exchange.pull is called, but we can check a bit more directly by checking if we have any remote refs yet. This is the same as a check we do in GitHandler.fetch_pack().

Tests that the various help files are properly registered

Load commonly used test logic
  $ . "$TESTDIR/testutil"

  $ hg help | grep 'git' | sed 's/  */ /g'
   hggit push and pull from a Git server
   git Working with Git Repositories

Mercurial 3.7+ uses single quotes
  $ hg help hggit | grep 'help git' | sed "s/'/\"/g"
  For more information and instructions, see "hg help git"
  $ hg help git | grep 'Working with Git Repositories'
  Working with Git Repositories