Minor refactoring in frontend/resolution

Fix typos, formatting, diagnostic message

compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/tower/NewResolutionOldInference.kt

@@ -261,20 +261,18 @@ class NewResolutionOldInference(
     ): Boolean {
         val reference = context.call.calleeExpression as? KtReferenceExpression ?: return false
 
-        val errorCadidates = when (kind) {
+        val errorCandidates = when (kind) {
             ResolutionKind.Function -> collectErrorCandidatesForFunction(scopeTower, name, detailedReceiver)
             ResolutionKind.Variable -> collectErrorCandidatesForVariable(scopeTower, name, detailedReceiver)
             else -> emptyList()
         }
 
-        for (candidate in errorCadidates) {
-            if (candidate is ErrorCandidate.Classifier) {
-                context.trace.record(BindingContext.REFERENCE_TARGET, reference, candidate.descriptor)
-                context.trace.report(Errors.RESOLUTION_TO_CLASSIFIER.on(reference, candidate.descriptor, candidate.kind, candidate.errorMessage))
-                return true
-            }
-        }
-        return false
+        val candidate = errorCandidates.firstOrNull() as? ErrorCandidate.Classifier ?: return false
+
+        context.trace.record(BindingContext.REFERENCE_TARGET, reference, candidate.descriptor)
+        context.trace.report(Errors.RESOLUTION_TO_CLASSIFIER.on(reference, candidate.descriptor, candidate.kind, candidate.errorMessage))
+
+        return true
     }
 
     private class ImplicitScopeTowerImpl(

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/tower/ErrorCandidateFactory.kt

@@ -31,12 +31,14 @@ enum class WrongResolutionToClassifier(val message: (Name) -> String) {
     INTERFACE_AS_VALUE({ "Interface $it does not have companion object" }),
     INTERFACE_AS_FUNCTION({ "Interface $it does not have constructors" }),
     CLASS_AS_VALUE({ "Class $it does not have companion object" }),
-    OBJECT_AS_FUNCTION({ " Function 'invoke()' is not found in object $it " })
+    OBJECT_AS_FUNCTION({ "Function 'invoke()' is not found in object $it" })
 }
 
 sealed class ErrorCandidate<out D: DeclarationDescriptor>(val descriptor: D) {
-    class Classifier(classifierDescriptor: ClassifierDescriptor, val kind: WrongResolutionToClassifier)
-    : ErrorCandidate<ClassifierDescriptor>(classifierDescriptor) {
+    class Classifier(
+            classifierDescriptor: ClassifierDescriptor,
+            val kind: WrongResolutionToClassifier
+    ) : ErrorCandidate<ClassifierDescriptor>(classifierDescriptor) {
         val errorMessage = kind.message(descriptor.name)
     }
 }
@@ -99,4 +101,4 @@ private fun ErrorCandidateContext.asClassifierCall(asFunction: Boolean) {
 
 
     add(ErrorCandidate.Classifier(classifier, kind))
-}
\ No newline at end of file
+}