https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Text/Whitespace
Handling whitespace - CSS | MDN
The presence of whitespace in the DOM can cause layout problems and make manipulation of the content tree difficult in unexpected ways, depending on where it...
handling whitespacecssmdn
https://drewdevault.com/blog/The-rc-shell-and-whitespace/
The rc shell and its excellent handling of whitespace
rcshellexcellenthandlingwhitespace