Don't suggest cast when !! is possible #KT-18033 Fixed

idea/testData/quickfix/typeMismatch/casts/preferExclExcl.kt

@@ -0,0 +1,15 @@
+// "Cast expression 's' to 'String'" "false"
+// ACTION: Add 'toString()' call
+// ACTION: Add non-null asserted (!!) call
+// ACTION: Change parameter 's' type of function 'bar' to 'String?'
+// ACTION: Convert to expression body
+// ACTION: Create function 'bar'
+// ACTION: Surround with null check
+// ACTION: Wrap with '?.let { ... }' call
+// ERROR: Type mismatch: inferred type is String? but String was expected
+
+fun foo(s: String?) {
+    bar(<caret>s)
+}
+
+fun bar(s: String){}