servo: Merge #18924 - Fix commonmark Markdown warnings in docs, part 1 (from mbrubeck:doc); r=Manishearth

Fixes warnings from rust-lang/rust#44229 when `--enable-commonmark` is passed to rustdoc.

This is mostly a global find-and-replace for bare URIs on lines by themselves in doc comments.

---

- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes do not require tests because they are doc formatting changes only

Source-Repo: https://github.com/servo/servo
Source-Revision: 0e62a5829b7c29ae2667a21a439aff1e89201bf3

servo/python/tidy/servo_tidy/tidy.py

@@ -852,7 +852,7 @@ def check_spec(file_name, lines):
     macro_patt = re.compile("^\s*\S+!(.*)$")
 
     # Pattern representing a line with comment containing a spec link
-    link_patt = re.compile("^\s*///? https://.+$")
+    link_patt = re.compile("^\s*///? (<https://.+>|https://.+)$")
 
     # Pattern representing a line with comment or attribute
     comment_patt = re.compile("^\s*(///?.+|#\[.+\])$")