Strip granularity option for NER labeling

Hi,
There are currently 2 ways of doing NER labeling using the granularity option:
- "symbol" which is a raw selection
- "word" which expand the selection until a space

Is there any plan to add a "strip" selection? In this context, it is similar to "symbol" but removes extra spaces (tab, whitespace, newline) on left and right (similar to `.strip()` in python).