verify-single opens many new buffers when using line numbers

[gcentauri]

due to the buffer naming scheme in the code, we get many open buffers when using verify-single and line numbers. this is mostly harmless, but i'm not sure its expected behavior. if i remember correctly, other test runners replace the current test comint buffer rather than making a new one.

[xinyifly]

I belive it's related to

(defun minitest--verify-single-rails ()
  ;; ...
  (minitest-run-file (format "%s:%s" file-name line-number))

and

(defun minitest-buffer-name (file-or-dir)
  (concat "*Minitest " file-or-dir "*"))

Maybe we should provide a custom variable named like minitest-buffer-name-reuse-file that removes the trailing : in file-or-dir

[gcentauri]

@xinyifly - thanks for the comment! i think you're right. I haven't made time for Emacs work lately but I like your suggestion. My initial hesitation was breaking behavior people were used to. Having an option to re-use the buffer name for verify single would be a good compromise