Highlight named overrides properly
Highlight named overrides properly

This is overrides of the form `x +y: expr`.

Change-Id: I34ade3911dc5e8273774e4cf6835b1a356beb1fe

flabbergast-config/flabbergast,apmasell/flabbergast,flabbergast-config/flabbergast,apmasell/flabbergast,flabbergast-config/flabbergast,apmasell/flabbergast,apmasell/flabbergast,apmasell/flabbergast,apmasell/flabbergast,flabbergast-config/flabbergast,flabbergast-config/flabbergast