public static boolean unifiedDiff(final Path expectedFile, final Path actualFile) {
        return unifiedDiff(expectedFile, actualFile, 3);
    }
Generate a unified diff of the two files using the default number of lines of context.
The diff output is sent to system out in coloured form.

@return True if the files are the same
stroom-test-common/src/main/java/stroom/test/common/ComparisonHelper.java