gistfile1.txt

$ bundle exec rspec spec -fd

Callisto::Lexer
  #tokenize
    tokenizes a blank message to an empty array
    tokenizes 'key' into a single identifier
    tokenizes 'foo bar' into two identifiers
    tokenizes hex numbers
    tokenizes integers
    tokenizes numbers starting with a decimal point
    tokenizes numbers in scientific notation
    tokenizes a symbol
    tokenizes a symbol sequence
    tokenizes '1 + 2'
    tokenizes '1 + 2 * 3
    tokenizes '1+2*3' (without whitespace)