Fixes DocBlockr not working when Java method expects to return array

This fix should resolve #303. I have tested it on my machine and it is working.
For the issue linked to this pull request, see #303.

For your question, `\w+` makes sure a method declaration with an invalid return type like this will not be matched:  ` public static [] add(int x, int y) {`
The version that should be matched is: `public static int[] add(int x, int y) {`, where the return type is explicitly said to be an array of integers (`int[]`).