Rsense wont work if there is a colon in the buffer

[rranelli]

Rsense wont work on emacs 24.3 if there is a : character in the buffer.

For example,

class A
    def method1
    end
end

works fine, but if I change it to:

class A : Object
    def method1
    end
end

rsense ceases to complete anything. This is completely hindering my use of rsense.