prometheus/promql/testdata/literals.test

eval instant at 50m 12.34e6
	12340000

eval instant at 50m 12.34e+6
	12340000

eval instant at 50m 12.34e-6
	0.00001234

eval instant at 50m 1+1
	2

eval instant at 50m 1-1
	0

eval instant at 50m 1 - -1
	2

eval instant at 50m .2
	0.2

eval instant at 50m +0.2
	0.2

eval instant at 50m -0.2e-6
	-0.0000002

eval instant at 50m +Inf
	+Inf

eval instant at 50m inF
	+Inf

eval instant at 50m -inf
	-Inf

eval instant at 50m NaN
	NaN

eval instant at 50m nan
	NaN

eval instant at 50m 2.
	2

eval instant at 50m 1 / 0
	+Inf

eval instant at 50m -1 / 0
	-Inf

eval instant at 50m 0 / 0
	NaN

eval instant at 50m 1 % 0
	NaN