Add String Formatting

[prikhi]

Will need this soon, there are some existing libraries to do this for strings/numbers(search package site for number format), maybe just point users that way?

But at the very least I'll need something to strip trailing zeros(and the decimal point if necessary) & to truncate/round/expand to n-decimal places(just 2 at first).

[JolandaNava]

Hey, can you give some more context to this issue?
What functions are you hoping to implement, or is the formatting to be added to an existing function?