The more than two whitespaces, tabs and line-breaks will be suppressed to one space.

The clean HTML is here.

The clean HTML is here.

< p class = "clean" >The vain whitespaces< br / > in tags.< / p >
The tabs and
line-breaks between HTML tags will be removed.
' ' is one space(this will be kept).
Apache SSI tag will be kept.
Here, text will be kept.
These Eggs are unprotected.
This is text in SVG. This is text in SVG.