In scholarly, legal, and college student writing, a word may be partly wrapped in brackets without spaces, usually because it's in a quotation. Example: "[a]nother". Spellchecking usually shows this as wrong when, to a human, it's obviously right. A spellchecker should be able to ignore brackets if at least one is not spaced on either side from adjacent strings.
If a newer version of Writer has this, that's good enough. The version I'm reporting on has still been getting updated even after reputedly being at EOL.
I guessed my hardware.
This behavior is not yet in a recent version.
I'll set to NEW.
Ubuntu 15.04 64-bit
Build ID: 40m0(Build:2)