use spaced en-dash instead of spaced hyphen

[rybak]

I'm not sure if such patches dealing with punctuation style are welcome or not. I base my preference for dashes on English Wikipedia's Manual of Style:

Punctuating a sentence (em or en dashes)

Dashes are often used to mark divisions within a sentence: in pairs (parenthetical dashes, instead of parentheses or pairs of commas); or singly (perhaps instead of a colon). They may also indicate an abrupt stop or interruption, in reporting quoted speech. [...]

• An em dash is unspaced (with no space on either side):
  • Another "planet" was detected—but it was later found to be a moon of Saturn.
• An en dash is spaced (with a space on each side) when used as sentence punctuation:
  • Another "planet" was detected – but it was later found to be a moon of Saturn.

(permalink)

[rybak]

"Markdown links / check" seems to have failed, because https://opensource.org doesn't like being queried too often and starts returning 503 after too many.

FILE: ./emails.md
5 links checked.
FILE: ./intro/terms.md
[✖] https://opensource.org/osd
2 links checked.
ERROR: 1 dead links found!
[✖] https://opensource.org/osd → Status: 503
[...]
FILE: ./start/license.md
[✖] https://opensource.org/
1 links checked.
ERROR: 1 dead links found!
[✖] https://opensource.org/ → Status: 503

https://github.com/bagder/uncurled/runs/6785043092?check_suite_focus=true#step:4:308

[bagder]

Thanks!