[smlckz]

fix the typoes in "Important Regular expression cheat sheet:"

    * 0 or more
    .
    .
    .
    [a-q] ...
    [A-Q] ...
    .
    .
    .
    [abc] ...
    [^abc] ...

that is, remove backslashes from the front of them

[UKamath7]

thanks just saw it now