Fix folding of long comments of unfoldable characters in email headers #143935
Description
Linked PRs
- gh-143935: Email preserve parens when folding comments #143936
- [3.14] gh-143935: Email preserve parens when folding comments (GH-143936) #144034
- [3.13] gh-143935: Email preserve parens when folding comments (GH-143936) #144035
- [3.12] gh-143935: Email preserve parens when folding comments (GH-143936) #144036
- [3.11] gh-143935: Email preserve parens when folding comments (GH-143936) #144037
- [3.10] gh-143935: Email preserve parens when folding comments (GH-143936) #144350