Kaleidoscope 2.1 with Whitespace Ignoring is now available via Check for Updates or from the website: kaleidoscopeapp.com
2.1 is currently available as a beta. You need to visit the site to download it: kaleidoscopeapp.com/beta
The 2.1 update for Mac App Store customers will start rolling out later today.
Did you know Kaleidoscope has clipboard support? Edit > Paste to New Comparison (⌥⌘V) There's also an OS X service: blackpixel.com/blog/2013/02/c…