Edit pass: spelling, trailing space, and CRLF

[Roger-random]

Small fixes to Pixelblaze documentation:

• Some spelling errors, and removing one repeated "the the".
• Removed some trailing whitespace.
• Remove a few scattered CRLF so files are now consistently LF throughout.

[simap]

wow, I must have looked at this 100 times and kept missing those typos. thanks!