Fix formatting of some code alongside image cases

[parlough]

We plan to move away from this format soon, but fix the broken rendering until we have a chance to do so.

Fixes #12717

[gemini-code-assist]

Summary of Changes

Hello @parlough, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on resolving minor rendering inconsistencies within the Flutter website documentation. It primarily involves applying consistent formatting to the code-and-image.md render tags, ensuring proper spacing and punctuation for image and caption parameters. These changes are a temporary fix to improve current rendering until a larger, planned refactor of the documentation format can be implemented.

Highlights

• Documentation Formatting: Standardized the formatting within code-and-image.md render tags across multiple documentation files, specifically by adding spaces after colons and commas for parameters like image, caption, and alt.
• Missing Commas: Addressed rendering issues by inserting missing commas at the end of caption and alt parameters within the code-and-image.md render tags.
• Code Snippet Consistency: Corrected string literal quotes from double to single in several Dart code examples within the user-input.md file for improved consistency.

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[gemini-code-assist]

Code Review

This pull request primarily addresses formatting issues within render blocks in several Markdown files, as described. The changes improve consistency by adding spacing and commas. However, I've identified a critical typo in one of the Dart code examples that was modified. This typo introduces a syntax error and needs to be fixed. Apart from this, the formatting changes look good.

[sfshaza2]

lgtm

[flutter-website-bot]

Visit the preview URL for this PR (updated for commit 378704c):

https://flutter-docs-prod--pr12723-fix-12717-2gylxfek.web.app