Non-breaking space characters are problematic. They look identical to the normal space character, but is not. For that reason, it should never be typed as an UTF-8 literal, but only by using unicode sequences.

I have checked:
U+00A0 NO-BREAK SPACE (NBSP)
U+202F NARROW NO-BREAK SPACE (NNBSP)
U+2007 FIGURE SPACE
U+2060 WORD JOINER

In some places, these character were used when an ordinary space should have been used. I replaced those with normal space. In other places, they were correct, but as literals instead of unicode sequences. I replaced those instances with sequences.