Report UnexpectedKeywordArgument even if no keyword param is accepted

lib/steep/type_inference/send_args.rb

@@ -681,7 +681,15 @@ def each
             when KeywordArgs::MissingKeyword
               missing_keywords.push(*error.keywords.to_a)
             when PositionalArgs::UnexpectedArg
-              diagnostics << Diagnostic::Ruby::UnexpectedPositionalArgument.new(node: error.node, params: params)
+              if error.node.type == :kwargs
+                error.node.children.each do |kwarg|
+                  if kwarg.type == :pair
+                    diagnostics << Diagnostic::Ruby::UnexpectedKeywordArgument.new(node: kwarg, params: params)
+                  end
+                end
+              else
+                diagnostics << Diagnostic::Ruby::UnexpectedPositionalArgument.new(node: error.node, params: params)
+              end
             when PositionalArgs::MissingArg
               diagnostics << Diagnostic::Ruby::InsufficientPositionalArguments.new(node: node, params: params)
             end

test/type_check_test.rb

@@ -1358,4 +1358,36 @@ def foo(context)
       YAML
     )
   end
+
+  def test_argument_error__unexpected_unexpected_positional_argument
+    run_type_check_test(
+      signatures: {
+        "a.rbs" => <<~RBS
+          class Foo
+            def foo: () -> void
+          end
+        RBS
+      },
+      code: {
+        "a.rb" => <<~RUBY
+          Foo.new.foo(hello_world: true)
+        RUBY
+      },
+      expectations: <<~YAML
+        ---
+        - file: a.rb
+          diagnostics:
+          - range:
+              start:
+                line: 1
+                character: 12
+              end:
+                line: 1
+                character: 23
+            severity: ERROR
+            message: Unexpected keyword argument
+            code: Ruby::UnexpectedKeywordArgument
+      YAML
+    )
+  end
 end