Fix Swift helper indentation and PHP header comment grammar

[schani]

Two cosmetic fixes to generated output, found while testing 25.0.0-pre1.

Swift: generated helpers were misindented

The multiline templates in SwiftRenderer.ts encoded indentation level L as 2L−1 leading tabs, so all the emitted helper code — JSONNull, JSONCodingKey, JSONAny, the custom dateDecodingStrategy, and the Alamofire extension — rendered method bodies at 12 spaces inside 4-space-indented declarations:

    public func hash(into hasher: inout Hasher) {
            // No-op
    }

This PR halves the leading tab runs (every run in the file was odd-length, so the mapping is exact), making the generated Swift uniformly 4-space indented:

    public func hash(into hasher: inout Hasher) {
        // No-op
    }

The change is whitespace-only: 169 template lines in SwiftRenderer.ts, no logic touched.

PHP: header comment grammar

// This is a autogenerated file: → // This is an autogenerated file:

Testing

• npm run build clean, npm run test:unit passes (71/71).
• Verified generated Swift for samples that exercise JSONNull, JSONAny, JSONCodingKey, and the date decoder is uniformly indented, and that the PHP header renders correctly.

Unrelated nit noticed while testing, not fixable in a PR: the npm next dist-tag for the quicktype package still points at 9.0.13 — probably worth an npm dist-tag rm quicktype next.

🤖 Generated with Claude Code