Fix quotes in page-layout.html

[alxndr42]

I'm guessing that web browsers are flexible enough, but my text editor noticed. 😅

[missytake]

Yeaah, we get a PR for this every once in a while... problem is, this will cause merge conflicts for many people, and that is not really worth fixing a cosmetic problem - say sorry to your IDE ;)

Theoretically, since a while you can set www_folder=disabled in chatmail.ini. We could start detecting if <<<<<<<<<, ==========, and >>>>>>>>>> are in the www/src/*.md files, and recommend to resolve the merge conflicts or set www_folder=disabled to skip www upload. This would be in any case a good change, as merge conflicts can also happen for other reasons, and e.g. https://mehl.cloud/info.html has a conflict deployed as we speak. Can you maybe add that to this PR? I understand if that's out of your scope 😅

[alxndr42]

We could start detecting if <<<<<<<<<, ==========, and >>>>>>>>>> are in the www/src/*.md files, and recommend to resolve the merge conflicts or set www_folder=disabled to skip www upload.

Would this be done as part of the pyinfra deployment? I can try to look into that.

(Personally, I'm already using a separate location for www_folder, I just wanted to fix the quotes for anyone else who runs into this. Preferring to avoid a ton of merge conflicts is understandable, though.)

[alxndr42]

It might be a bit confusing to repurpose this PR for merge conflict detection, so I created a separate issue for it: #713