Added correctness check of test data + fixed huge amount of incorrect code in test data

idea/testData/slicer/inflow/lambdaImplicitParameter.leafGroups.txt

@@ -1,6 +1,6 @@
-4 return f(<bold>1</bold>)
-9 	println(<bold>it</bold>)
+4 f(<bold>1</bold>)
+9 	val v = <bold>it</bold>
 8 		[LAMBDA CALLS] foo <bold>{</bold>
-3 			[LAMBDA CALLS] fun foo(<bold>f: (Int) -> Unit</bold>): Int {
-4 				return f(<bold>1</bold>)
+3 			[LAMBDA CALLS] fun foo(<bold>f: (Int) -> Unit</bold>) {
+4 				f(<bold>1</bold>)