Evas textblock: Fix rendering of spaces in some cases.

The issue was with a textblock that's being resized and a space between formats.
The problem is, that the text would get trimmed when wrapping, and then not
restored, because it had nothing to merge to.

This fixes T924.

src/lib/evas/canvas/evas_object_textblock.c

@@ -4491,6 +4491,7 @@ _layout_par(Ctxt *c)
                     }
                   else
                     {
+                       ititr->visually_deleted = EINA_FALSE;
                        prev_it = ititr;
                     }
                }