QUESTION: Fix punctuation: Bonuses will be credited to your account on 30th December 2015
ANS: Bonuses will be credited to your account on 30th December 2015.

QUESTION: Fix punctuation: For more information you can take a look at the list of bugs blocking the s390x port
ANS: For more information you can take a look at the list of bugs blocking the s390x port.

QUESTION: Fix punctuation: By adding a solvent to the dye bath the polyester fibres are partially softened and the dyes can penetrate the polyester
ANS: By adding a solvent to the dye bath, the polyester fibres are partially softened, and the dyes can penetrate the polyester.

QUESTION: Fix punctuation: By Guillaume Godard Theres a larger version here Canon
ANS:
By Guillaume Godard. There's a larger version here: Canon.