Possible incompatability with attr_list extension

[Andre601]

I've noticed that when I use a { ... } pattern on a h1 header, that this tag isn't stripped from the page's <title> content, causing something like this:

After some testing around, I've figured out that this issue only seems to appear if you're using the attr_list extension in combination with the macros plugin itself.

I've tested this on a bare-minimum setup using the default theme and only the attr_list extension and macros plugin.
You can get this setup here: reproduction_example.zip

[fralau]

# Welcome to MkDocs { #lorem-ipsum }

Lorem ipsum dolor sit amet

🤔
The one thing that I can say offhand, is that the plugin does some footwork to interpret Jinja2 in titles (in menus). Could it interfere in some way?

[YuriiMotov]

Also faced this issue. Is there a workaround?

[fralau]

@Andre601 @YuriiMotov The first thing to realize, is that the attr_list syntax syntax and the Jinja2 syntax used by Mkdocs-Macros are likely to interfere, since they both use the { and } symbols.

A workaround in MkDocs-Macros would be to change the characters used by JinJa2 in macros, and definitions (typically { -> [ and } -> ]).

In general, the workarounds are described on this page.

[YuriiMotov]

Thanks you for reply!

I already tried the workaround with changing characters used by Jinja2, but it didn't help..
I looked at other solutions, but all of them either don't work or not suitable for us.

For now the only working solution we found is to override the templates to strip the part of title starting from { #. But we consider this only as a temporary workaround

[fralau]

Treated as issue in #266, solved with 62daea9.