I’ve noticed strange characters appearing in Writer documents that look like spaces higlighted black. They look just as regular spaces when seen in Page Preview, as opposed to the ones you would higlight manually which would show black in preview too.
They appeared several times, for instance, after copying text from web browser into Writer.
Anyone knows what they are and how to possibly prevent them from showing or is it a bug?
EDIT: Thanks to @manj_k the solution is pinpointed. I looked up some additional info about non-breaking spaces:
It’s Unicode value is U+00A0 and it can be searched for in a document using \x00A0 provided regular expresions are enabled.