Preserve zero indentation when updating inline snapshot

[pfgithub]

What does this PR do?

Forgot this case in #16685

expect("keeps no\n\nindentation").toMatchInlineSnapshot(`
"no existing

indentation"
`);

// bun test -u

(this PR)

expect("keeps no\n\nindentation").toMatchInlineSnapshot(`
"keeps no

indentation"
`);

(vs after #16685 it would update to)

expect("keeps no\n\nindentation").toMatchInlineSnapshot(`
  "keeps no

  indentation"
`);

[robobun]

^{Updated 3:20 PM PT - Jan 27th, 2025}

❌ @pfgithub, your commit b830856 has 2 failures in Build #10656:

• test/js/bun/test/mock/mock-module.test.ts - segmentation fault on 🐧 24.04 x64
• test/cli/install/bun-install-registry.test.ts - 3 failing on 🪟 2019 x64
• test/cli/install/bun-install-registry.test.ts - 1 failing on 🪟 2019 x64-baseline

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🧪   try this PR locally:

bunx bun-pr 16813