Merge branch 'mm/test-in-absolute-home'

Tests that compare $HOME and $(pwd), which should be the same
directory unless the tests chdir's around, would fail when the user
enters the test directory via symbolic links, which has been
corrected.

* mm/test-in-absolute-home:
  t: run tests from a normalized working directory

t/test-lib.sh

@@ -1577,6 +1577,8 @@ fi
 # Use -P to resolve symlinks in our working directory so that the cwd
 # in subprocesses like git equals our $PWD (for pathname comparisons).
 cd -P "$TRASH_DIRECTORY" || BAIL_OUT "cannot cd -P to \"$TRASH_DIRECTORY\""
+TRASH_DIRECTORY=$(pwd)
+HOME="$TRASH_DIRECTORY"
 
 start_test_output "$0"