Thanks very much for the speedy replies guys, but...
Robert Großkopf wrote:
Aren't this shades none-breaking spaces? If I set Insert →
Formatting Mark → Non-breaking space I get the same shades.
That, or something similar, is what I thought they were, but it was not
making sense to have a "real" space character immediately followed by a
non-breaking space. See my reply to K-J below.
K-J LibreOffice wrote:
No, as there is a space in front of it. I think It is the mark for
the alphatbetic index at the end of every document. So don't delete
it.
OK! Now that I have turned on "Help Tips" (I normally have these
irritating things turned off.) and cross checked against the
alphabetical index of the last published copy of the full GS Guide, I
see that you are correct.
However, if an author/editor changes the "Entry" name, as it appears to
be the case with our guides, and the "Help Tips" are turned off, there
is no way to visually differentiate between an "Index Entry" and a
"Non-Breaking Space", or some other similar field. (ie. They are just
meaningless little normally grey/gray blobs.)
I cannot think of any good reason why ALL Index Entry words are not
fully shaded identically, no matter what changes an author/editor makes
in the "Insert Index Entry" dialog, I will be looking for this, or
posting a request, in Bugzilla.
Best Regards
Dave