 
 (defconst rdebug--stack-frame-1st-regexp
   "^\\(-->\\|   \\) +#\\([0-9]+\\)\\(.*\\)"
-  "Regexp to recognize the first line of a a stack frame line in rdebug stack buffers.")
+  "Regexp to match the first line of a stack frame in rdebug stack buffers.")
 
 (defconst rdebug--stack-frame-2nd-regexp
   "\s+at line +\\([^:]+\\):\\([0-9]+\\)$"
-  "Regexp to recognize the second line of a a stack frame line in rdebug stack buffers.")
+  "Regexp to match the second line of a stack frame in rdebug stack buffers.")
 
 (defconst rdebug--stack-frame-regexp
   (concat rdebug--stack-frame-1st-regexp rdebug--stack-frame-2nd-regexp)

  (rdebugtrack-mode 1))

(defun turn-off-rdebugtrack ()
  (interactive)
  (setq rdebugtrack-is-tracking-p nil)
  (rdebugtrack-toggle-stack-tracking 0)

        (gud-call (format "undisplay %s" (match-string 1))))))

(defun rdebug-watch-edit (number expr)
  "Edit a watched expression in the `rdebug' Ruby debugger."
  (interactive
   (let ((number nil)
         (expr nil))
