Allow adjacent oneline method definitions

[soulcutter]

The purpose of oneline methods is a terser format for simple methods, similar to defining variables.

This rule change allows oneline methods to be grouped more-closely together, just as you might group variables to convey meaning. This also accomplishes terser class definitions that don't have mandatory double-spacing between oneline methods.

This permits code like:

def one = "one"
def two = "two"

def number? = true
def animal? = false

Fixes #695

[kmcphillips]

+1