removeRepeatedCharacters is too aggressive with whitespaces #591

I use your code to scrape my own bank statements (via the python wrapper) and then feed them into a NER pipeline for analytics. As a result, whitespaces matter a bit to me for tokenisation.

Currently my credit card statements contain padding to line up some vendor details. These get removed entirely on the as-is package:

and i lose the word boundary.

if I up the removeRepeatedCharacters call (in TextChunk.groupByLines) from 3 to 20, I get the original padding that statement pdf intended.

I think going forward, it would be nice to either

• make this minRunLength a parameter of sorts so people can choose for themselves
• OR update TextChunk,squeeze to leave a single whitespace if all chars being squeezed are whitespaces just to not lose a word boundary as it's a little different to other spelling things.