support negative modifier (backward scan)
add use case of negative field number
update help
support backspace in interactive mode
fix non-interactive EasyAlign to take negative field #
finish implementing negative field number
add support for unicode characters
remove unnecessary nr2char call
fix to preserve trailing whitespaces from prefix when delimiter sticks to left
update doc
Merge pull request #1 from junegunn/negative-modifier

Add support for negative field number (scan backwards)