Ignore letters other than e/E if number is decimal, and ignore all letters after e/E

["Soni \"They/Them\" L." <fakedme@...>]

Currently Lua ignores some letters after numbers, but not enough:

> x=1print(x)
1
> x=1eprint(x)
stdin:1: malformed number near '1e'
> x=1fprint(x)
stdin:1: malformed number near '1f'
> x=1aprint(x)
stdin:1: malformed number near '1a'

additionally if your number has an e:

> x=1e0eprint(x)
stdin:1: malformed number near '1e0e'

it'd be nicer if the number parser was more strict so only actual parts 
of numbers would be consumed by it. this would make almost all of the 
above cases valid lua, except x=1eprint(x)