markdown-insert-gfm-code-block default language

[conal]

In markdown-insert-gfm-code-block (C-c C-s P), I'm offered a what looks like a default (e.g., "haskell"), but when I press enter, I don't get a language for the fenced code region. Intended behavior? I can fix the code easily enough to use (car markdown-gfm-used-languages) as the default in completing-read, instead of adding to the prompt string, i.e., change

                (completing-read
                 (format "Programming language [%s]: "
                         (or (car markdown-gfm-used-languages) "none"))
                 (markdown-gfm-get-corpus)
                 nil 'confirm (car markdown-gfm-used-languages)
                 'markdown-gfm-language-history)

to

                (completing-read
                 "Programming language: "
                 (markdown-gfm-get-corpus)
                 nil 'confirm (car markdown-gfm-used-languages)
                 'markdown-gfm-language-history)

I like this behavior, but I'm unsure it's the behavior you want. If it is, I'll submit a pull request.

[conal]

Oops. Now I see that the language offered is the most recently added language, not most recently chosen language. A simple fix in markdown-gfm-add-used-language is to replace

  (add-to-list 'markdown-gfm-used-languages
               (markdown-clean-language-string lang))

by

  (setq markdown-gfm-used-languages
        (cons lang (remove lang markdown-gfm-used-languages)))

[jrblevin]

Thanks for reporting and fixing this! Sorry it took me so long to take a closer look. I didn't want to trouble you for a PR this long after the fact, so I applied the patch by hand as 7d8f78b. It seems fine to me, but let me know if you see any issues.