RTE uses double spacing as default instead of single spacing

Unnecessary line spaces in RTE — The RTE seems to put big line spaces between each line. These actually translate to line breaks when the text is viewed in wiki markup.

from Andrew Lui's blitz test:
Unnecessary line spaces in RTE — The RTE seems to put big line spaces between each line. These actually translate to line breaks when the text is viewed in wiki markup.

Add a page
type something
hit enter
type something else

notice that there is a double space. Default should be a single space.