Removes unwanted characters from passcode
Removes unwanted characters from passcode

Sometimes copying passcodes from https://plus.google.com/communities/108599095839806789745 will contain an invisible character(s) at the end which causes it to be invalid. This patch will remove non printable characters from a passcode before submitting it to Ingress.

I've found the bytes 0xefbbbf sometimes appear which is a BOM character.
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