Fix misc typos in IR backends

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/CallableReferenceLowering.kt

@@ -213,7 +213,7 @@ internal class CallableReferenceLowering(val context: JvmBackendContext) : FileL
             val lastParameterType = unboundCalleeParameters.lastOrNull()?.type
             if ((lastParameterType as? IrSimpleType)?.classifier == continuationClass) {
                 // If the last parameter is Continuation<> inherit from SuspendFunction.
-                suspendFunctionClass = context.getIrClass(FqName("kotlin.Suspendfunction${numberOfParameters - 1}")).owner
+                suspendFunctionClass = context.getIrClass(FqName("kotlin.coroutines.SuspendFunction${numberOfParameters - 1}")).owner
                 val suspendFunctionClassTypeParameters = functionParameterTypes.dropLast(1) +
                         (lastParameterType.arguments.single() as IrTypeProjection).type
                 functionReferenceClassSuperTypes += IrSimpleTypeImpl(

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/descriptors/IrBuiltIns.kt

@@ -245,6 +245,6 @@ class IrBuiltIns(
         const val THROW_CCE = "THROW_CCE"
         const val THROW_ISE = "THROW_ISE"
         const val NO_WHEN_BRANCH_MATCHED_EXCEPTION = "noWhenBranchMatchedException"
-        const val ILLEGAL_ARGUMENT_EXCEPTION = "illegalArgumentException "
+        const val ILLEGAL_ARGUMENT_EXCEPTION = "illegalArgumentException"
     }
 }