Most of the code I write is in Ruby, and every once in a while, I make some typo which only gets caught after a while. This is irritating when I have my scripts running long tasks, and return to find I had a typo.
Is there an actively developed lint tool for Ruby that could help me overcome this? Would it be possible to use it across a system that works with a lot of source files, some of them loaded dynamically?
Take this snippet as an example:
a = 20
b = 30
puts c
To win bounty, show me a tool that will detect the c variable as not created/undefined.