all: Format code with gofumpt

See https://github.com/mvdan/gofumpt

tpl/internal/go_templates/htmltemplate/example_test.go

@@ -82,7 +82,6 @@ func Example() {
 	// 		<div><strong>no rows</strong></div>
 	// 	</body>
 	// </html>
-
 }
 
 func Example_autoescaping() {
@@ -123,7 +122,6 @@ func Example_escape() {
 	// \"Fran \u0026 Freddie\'s Diner\" \u003Ctasty@example.com\u003E
 	// \"Fran \u0026 Freddie\'s Diner\"32\u003Ctasty@example.com\u003E
 	// %22Fran+%26+Freddie%27s+Diner%2232%3Ctasty%40example.com%3E
-
 }
 
 func ExampleTemplate_Delims() {