Rust Book: Don't use "px" as font size unit

[StefanoD]

Displays have different resolutions, so it is not recommended using px as font-size unit. It is better to use em or %.

[carols10cents]

So @steveklabnik is in the process of moving the existing book to use mdBook, which is what the in-progress new book already uses. Taking a quick glance, it looks like mdBook's styling uses ems (it did everywhere I looked at least).

So I think PR #39633 will close this (I don't have permission to close this issue though :)).

[StefanoD]

Ok, thx. For the information.
i looked at the new book version and it is almost true what you say, but I could find one font-size declaration using px:

.menu-title {
  display: inline-block;
  font-weight: 200;
  font-size: 20px;
  //...
}

Maybe this was made on purpose, maybe not. I'm not really the web-dev guy. :)

This is where I looked at:
http://rust-lang.github.io/book/

[carols10cents]

Yeah that CSS comes from mdBook, so it would need to be fixed over there.

[StefanoD]

Ok, thx. I opened an issue on mdBook.
https://github.com/azerupi/mdBook/issues/203