--- a/.elisp/settings/40.modes.el
+++ b/.elisp/settings/40.modes.el
@@ -110,3 +110,9 @@ point."
 
 ;; Tempfiles from mutt should be edited in mail-mode.
 (add-to-list 'auto-mode-alist '("/mutt" . mail-mode))
+
+(if (file-exists-p "~/Programming/hg/crew/contrib/hg-test-mode.el")
+    (progn
+      (load "~/Programming/hg/crew/contrib/hg-test-mode.el")
+      (add-to-list 'auto-mode-alist '("\\.t$'" . hg-test-mode))
+      (add-hook 'hg-test-mode-hook 'af-no-clean-whitespace)))

deleted file mode 100644
--- a/.elisp/settings/50.compilation-tweaks.el
+++ /dev/null
@@ -1,75 +0,0 @@
-(require 'compile)
-
-(setq af--hg-test-traceback "^\\+  File ['\"]\\([^'\"]+\\)['\"], line \\([0-9]+\\),")
-
-(setq compilation-error-regexp-alist-alist
-  (cons `(mercurial-test-output-tb ,af--hg-test-traceback 1 2)
-        (assq-delete-all 'mercurial-test-output-tb
-                         compilation-error-regexp-alist-alist)))
-
-(setq af--hg-check-code-error-re "  \\([^:\n]+\\):\\([0-9]+\\):$")
-
-(setq compilation-error-regexp-alist-alist
-  (cons `(mercurial-check-code-output ,af--hg-check-code-error-re 1 2)
-        (assq-delete-all 'mercurial-check-code-output
-                          compilation-error-regexp-alist-alist)))
-
-(add-to-list 'compilation-error-regexp-alist 'mercurial-test-output-tb)
-(add-to-list 'compilation-error-regexp-alist 'mercurial-check-code-output)
-
-;; to debug:
-;;(setq compilation-error-regexp-alist '(mercurial-check-code-output
-;;                                       mercurial-test-output-tb))
-
-
-;; stolen from compile-tests.el
-(defun af--compile--test-error-line (test)
-  (erase-buffer)
-  (setq compilation-locs (make-hash-table))
-  (insert (car test))
-  (compilation-parse-errors (point-min) (point-max))
-  (let ((msg (get-text-property (nth 1 test) 'compilation-message)))
-    (should msg)
-    (let ((loc (compilation--message->loc msg))
-          (col  (nth 2 test))
-          (line (nth 3 test))
-          (file (nth 4 test))
-          (type (nth 5 test))
-          end-col end-line)
-      (if (consp col)
-          (setq end-col (cdr col) col (car col)))
-      (if (consp line)
-          (setq end-line (cdr line) line (car line)))
-      (should (equal (compilation--loc->col loc) col))
-      (should (equal (compilation--loc->line loc) line))
-      (when file
-        (should (equal (caar (compilation--loc->file-struct loc)) file)))
-      (when end-col
-        (should (equal (car (cadr (nth 2 (compilation--loc->file-struct loc))))
-                       end-col)))
-      (should (equal (car (nth 2 (compilation--loc->file-struct loc)))
-                     (or end-line line)))
-      (when type
-        (should (equal type (compilation--message->type msg)))))
-    msg))
-
-(defvar af--compile-tests--test-regexps-data
-  ;; The computed column numbers are zero-indexed, so subtract 1 from
-  ;; what's reported in the string.  The end column numbers are for
-  ;; the character after, so it matches what's reported in the string.
-  '(;;hg test-check-code
-    ("+  contrib/debugshell.py:37:" 1 nil 37 "contrib/debugshell.py")
-    ("+    File \"/tmp/hg/mercurial/commands.py\", line 3115, in help_"
-     1 nil 3115 "/tmp/hg/mercurial/commands.py")
-    ))
-
-(require 'ert)
-(ert-deftest af--hg-error-cases ()
-  "Test hg-specific compilation-mode regular expressions"
-  (with-temp-buffer
-    (font-lock-mode -1)
-    (mapc #'af--compile--test-error-line af--compile-tests--test-regexps-data)))
-
-;; To run tests:
-;;
-;; emacs -batch -l .elisp/settings/50.compilation-tweaks.el -f ert-run-tests-batch-and-exit