fix: place preferred char in space token

[idoros]

This PR fixes #122 that claims that \r\n takes just the \r into the space token value.

The case is a little different. The space token takes only a single char into the value and breaks the rest of the whitespace to before and after. It used to search for normal space, and fallback to the first character. Now it looks for normal space and falls back to \n and then \t and only then picks the first character.

This is done presumably to help code formatting, but seems unnecessary to me. I change this in order to close the issue, but would prefer removing he before and `after altogether at some point.