fix: address remaining lint issues

Remove unused struct field writes in gmail_send_test.go and add blank
lines before if statements in errfmt_test.go to satisfy wsl linter.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: salmonumbrella

internal/cmd/gmail_send_test.go

@@ -513,8 +513,6 @@ func TestReplyAllValidation(t *testing.T) {
 	// Test that --reply-all requires --reply-to-message-id
 	cmd := &GmailSendCmd{
 		ReplyAll: true,
-		Subject:  "Test",
-		Body:     "Test body",
 	}
 
 	// This would normally go through Run(), but we can test the validation logic

internal/errfmt/errfmt_test.go

@@ -70,6 +70,7 @@ func TestFormat_KongParseError_UnknownFlag(t *testing.T) {
 	type TestCmd struct {
 		Max int64 `name:"max" help:"Max results"`
 	}
+
 	parser, err := kong.New(&TestCmd{})
 	if err != nil {
 		t.Fatal(err)
@@ -91,6 +92,7 @@ func TestFormat_KongParseError_WithSuggestion(t *testing.T) {
 	type TestCmd struct {
 		Limit int64 `name:"limit" help:"Limit results"`
 	}
+
 	parser, err := kong.New(&TestCmd{})
 	if err != nil {
 		t.Fatal(err)
@@ -116,6 +118,7 @@ func TestFormat_KongParseError_UnknownFlagWithAlias(t *testing.T) {
 	type TestCmd struct {
 		Max int64 `name:"max" aliases:"limit" help:"Max results"`
 	}
+
 	parser, err := kong.New(&TestCmd{})
 	if err != nil {
 		t.Fatal(err)