Replace non standard unicode spaces (NBSP/NNBSP) to regular space (SP)

While editing a doc my editor flagged some non-standard characters, which I found to be:

• U+00A0 : NO-BREAK SPACE [NBSP]
• U+202F : NARROW NO-BREAK SPACE [NNBSP]

This issue is simply to keep track of the MRs I will create to clean up this minor quirk in a few docs and files.