const go/token.SUB_ASSIGN

4 uses

	go/token (current package)
		token.go#L52: 	SUB_ASSIGN // -=
		token.go#L161: 	SUB_ASSIGN: "-=",

	go/parser
		parser.go#L1921: 		token.SUB_ASSIGN, token.MUL_ASSIGN, token.QUO_ASSIGN,

	go/scanner
		scanner.go#L887: 			tok = s.switch3(token.SUB, token.SUB_ASSIGN, '-', token.DEC)