Revamp Prepared Patterns

[danon]

Pattern::inject('\@', [$value]);  // This is being debated

Pattern::inject('[@]', [$value]);     // doesn't work with alteration or an empty string
Pattern::inject('\Q@\E', [$value]);   // This should probably treat it as "@" literal
Pattern::inject('\Q\@\E', [$value]);  // This should probably treat it as "\@" literal
Pattern::inject('\Q[@]\E', [$value]); // This should probably treat it as "[@]" literal
Pattern::inject('#@', [$value], 'x'); // This seams to work out of the box
Pattern::inject('#[@]', [$value], 'x'); // This seams to work out of the box
Pattern::inject('#\Q[@]\E', [$value], 'x'); // This seams to work out of the box