Some correct URLs do not show up as inline link

[telephon]

Standard URLs / URIs can contain commas or brackets. These are excluded from the markdown-regex-uri.

Expected Behavior

Take a link like this: https://en.wikipedia.org/wiki/File:L%C3%A1szl%C3%B3_Moholy-Nagy,_nuclear_II,_1946_(milwaukee_art_museum).jpg

https://en.wikipedia.org/wiki/File:L%C3%A1szl%C3%B3_Moholy-Nagy,_nuclear_II,_1946_(milwaukee_art_museum).jpg

Should become a clickable link when it occurs inline in the text, like in the github markdown right here.

Actual Behavior

It results in a broken link in markdown-mode when directly present in the text:

https://en.wikipedia.org/wiki/File:L%C3%A1szl%C3%B3_Moholy-Nagy,_nuclear_II,1946(milwaukee_art_museum).jpg

Steps to Reproduce

Paste the link https://en.wikipedia.org/wiki/File:L%C3%A1szl%C3%B3_Moholy-Nagy,_nuclear_II,_1946_(milwaukee_art_museum).jpg into a markdown file.

Then, this shows as a broken link.

Instead of

(defconst markdown-regex-uri
  (concat "\\(" (regexp-opt markdown-uri-types) ":[^]\t\n\r<>,;() ]+\\)")
  "Regular expression for matching inline URIs.")

you can write

(defconst markdown-regex-uri
  (concat "\\(" (regexp-opt markdown-uri-types) ":[^]\t\n\r<>]+\\)")
  "Regular expression for matching inline URIs.")

And after reopening the markdown file with the above url, it will inline correctly.

I don't know why these characters are excluded, so I may miss some side-effect here. Also one may want to exclude even less.

Software Versions