Added DoubleAsStringWithPrecision function - Linear Algebra

[devikamehra]

Added DoubleAsStringWithPrecision function to Linear Algebra

This is to resolve #1788

[tcNickolas]

I'm not sure we need to improve the display of Doubles in this particular kata... The tasks deal with exactly one test case each, and the matrices they work with are carefully hand-picked to have very nice floating-point values in them, with at most one decimal point. I don't think the learner is likely to try and return values with a lot of decimal points either, since most operations involve only simple things like swapping numbers around and addition/subtraction, not a lot of division going on here. This means that enforcing precision 3 would actually make the displayed numbers longer with just extra trailing zeros

[devikamehra]

I'm not sure we need to improve the display of Doubles in this particular kata... The tasks deal with exactly one test case each, and the matrices they work with are carefully hand-picked to have very nice floating-point values in them, with at most one decimal point. I don't think the learner is likely to try and return values with a lot of decimal points either, since most operations involve only simple things like swapping numbers around and addition/subtraction, not a lot of division going on here. This means that enforcing precision 3 would actually make the displayed numbers longer with just extra trailing zeros

So, should I reduce the precision to 1 or remove this altogether?

[tcNickolas]

Precision 1 is the default display of doubles with 0 or 1 decimal points, so I don't think we need to change anything in this kata

[devikamehra]

Not required