Fix up grammar, spelling and reformat

@gorhgorh what do you think?
Paging @dominictarr as a native speaker
thanks for the vote of confidence mon ami, i know i _can_ mod stuff but i'm just joining the conversation here, @mmalecki has put in the effort to do this work and i would rather (if it's ok with everyone) to keep the workflow intact and give commit credits to those that contribute, PR comes in, we discuss it, add comments, PR gets amended (until it's correct), PR gets merged.. everyone is happy :-D