Use "-" as hour/minute/second separator instead of ":" to avoid
glitches in syntax highlighter for compilation-mode when do M-x grep.
--- a/.emacs-my Thu Nov 26 21:36:29 2015 +0200
+++ b/.emacs-my Mon Nov 30 00:49:45 2015 +0200
@@ -1714,7 +1714,7 @@
(setq field-to (substring field-to 0 32)))
(when (> (length field-subject) 64)
(setq field-subject (substring field-subject 0 64)))
- (setq file (concat gnus-article-save-directory "/" (format-time-string "%F_%T") "_" field-to "_" field-subject))
+ (setq file (concat gnus-article-save-directory "/" (format-time-string "%F_%H-%M-%S") "_" field-to "_" field-subject))
(with-temp-file file
(insert-buffer buf)
)) )