Tidy moves whitespace to outside of a <span>

[eshellman]

In: Moved white<span class="bold"> space</span>.
Out: Moved white <span class="bold">space</span>.

This causes problems when css sets a background color on the class, or floats it, or sets display:None, or when javascript replaces the content, etc.

This is with default settings, but the issue persists for any setting I try.
space.html.txt

reproduced on:
HTML Tidy for Apple macOS version 5.2.0
HTML Tidy for Apple macOS version 5.6.0
HTML Tidy for Linux version 5.6.0

[eshellman]

https://gist.github.com/eshellman/c9b519da90e6d7c8cffdd92ec78b13f7

[balthisar]

Confirmed on 5.7.47 (next) branch, as well.

PR's are welcome, as is any help.