I wish to enter a non-blanking space into a topic. That is, I
want to insert a space character between two words that keeps those
two words together rather than allowing line wrap to leave the
first word at the end of one line of text and the second word at
the beginning of the next line of text. This is useful for keeping
an area code in parenthesis and a phone number together.
Solutions already tried and faild:  RoboHelp HTML menubar
--> Insert --> Symbol (no symbol listed for non-blanking
space),  RoboHelp HTML menubar --> Help (empty results when
searching for non-blanking space),  keyboard shortcut from MS
Word (doesn't work here),  search user forums (empty results
when searching for non-blanking space), and  peruse Snippets at
Peter Grainge's site (not there either).
Is there a keyboard shortcut (or another method) for entering
a non-blanking space in RoboHelp HTML?