[Fixed] 'true' and 'false' as start of variable names

[tanaerao]

When variables are named using 'true' or 'false' as the first characters, I get the following error in the playground:

Syntax Error: Expected "->", "?", "|>", end of input, operator, statement separator, whitespace, or whitespace or newline but "N" found.

To reproduce:

falseNegativesBlack = 0.4 to 0.5
numberOfBlackPeople = 150000 to 175000

totalFalseNegatives = falseNegativesBlack * numberOfBlackPeople

Obviously, it is very easy to get around this by naming the variable differently, but thought I'd flag here nonetheless.

[OAGr]

Thanks so much for the report! Will file more formally.

[OAGr]

Closed #1007