Fixed regex for trimming multiple spaces

[aqum]

\s matches for any whitespace including line breaks. This removed new lines when there was two or more and broke preserveLineBreaks option.

[dbashford]

Could you add a test for this?

[aqum]

Sure, test added for whole function.

But what is the reason behind replaceTextChars? Are other extractors behave in the same way and this is only for normalization? NON_ASCII_CHARS regex removes most of non-english letters and makes tool useless in other languages. F.e. in Polish there are ąśćźńóę and they all gets stripped out.

[dbashford]

It may be that replaceTextChars is no longer necessary given the work that takes place in cleaseText. I'll need some time to play with it and to get some tests in places to make sure removing it doesn't regress anything.

The whitelist will preserve the letters you are talking about.

[dbashford]

Going to merge this and repub. But when I find time will need to track down whether or not replaceTextChars is necessary. See #60.