Style fixes in jsinterp

Use the opposite operator != instead of not ==

force-test skip release

src/jsinterp.py

@@ -817,7 +817,7 @@ def eval_method():
 					obj = argvals[0]
 					argvals = argvals[1:]
 					if func_prototype == 'apply':
-						if not len(argvals) == 1:
+						if len(argvals) != 1:
 							raise RuntimeError('Takes two arguments')
 						if not isinstance(argvals, list):
 							raise RuntimeError('Second argument needs to be a list')