Remove parenthesis for it_behaves_like calls (#1260) #1975

Job	Run time
RuboCop	47s
specs (ubuntu, 3.2.7)	1m 30s
specs (ubuntu, 3.3.7)	1m 29s
specs (ubuntu, 3.4.2)	1m 35s
specs (macos, 3.2.7)	1m 17s
specs (macos, 3.3.7)	1m 8s
specs (macos, 3.4.2)	1m 14s
specs (windows, 3.2.7)	4m 35s
specs (windows, 3.3.7)	4m 38s
specs (windows, 3.4.2)	5m 0s
specs (ubuntu, 3.4.2, --enable-frozen-string-literal)	1m 34s
	24m 47s

Provide feedback