== turned into a safe-call

idea/testData/checker/ExtensionFunctions.kt

@@ -58,7 +58,7 @@ fun Int.foo() = this
 
             command.foo
 
-            command.equals(null)
+            command<error descr="[UNSAFE_CALL] Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Command?">.</error>equals(null)
             command?.equals(null)
             command.equals1(null)
             command?.equals1(null)

idea/testData/unifier/equivalence/expressions/conventions/equals.kt

@@ -1,5 +1,6 @@
 val a = <selection>1 == 2</selection>
 val b = 1.equals(2)
+val b1 = 1?.equals(2)
 val c = 2.equals(1)
 val d = 1 === 2
 val e = 1 != 2

idea/testData/unifier/equivalence/expressions/conventions/equals.kt.match

@@ -1,3 +1,3 @@
 1 == 2
 
-1.equals(2)
+1?.equals(2)