### What's done:
- Fixed incorrect logic of String.toFloat() and String.toDouble().
Long string without any digits were treated as Float or Double:
"this string does not look as float isn't it?".toFloat() == "Infinity".
- Fixed incorrect parsing of floating point constants "NaN" and "Infinity":
String values like "NaNPICEZy" or "InfinityN" were treated as valid numbers.
- Merged parsing logic for Double and Float:
Removed the code duplication, unified methods, made the code more Kotlin-like, not C++-like.
- Updated tests:
Removed useless tests that checked nothing, updated tests with regression scenarios.
Andrey Kuleshov
26a71af6b3