An empty slashy string cannot be represented with a double forward slash, as it's .... Octal numbers are specified in the typical format of followed by octal digits. ...... def b1 = new Bucket(4) def b2 = new Bucket(11) assert (b1 + b2).size == 15 (1) ...... This tool makes installing Groovy on any Bash platform (Mac OSX, Linux, ...