docs: Readme files accuracy fix

[yzhao244]

Problem

There are a couple of readme file with spelling, capitalization fixes to align with rest of documents.

Solution

“a2a specification” -> “A2A specification”.
“Helloworld” -> “Hello World”.

Changes

docs/topics/a2a-and-mcp.md
docs/tutorials/python/4-agent-executor.md
docs/tutorials/python/7-streaming-and-multiturn.md
specification/grpc/README.md

Testing

✅ Documentation builds successfully with mkdocs
✅ Markdown linting passes
✅ All internal anchor links verified
✅ No broken cross-references

Issue

Fixes #1185

[gemini-code-assist]

Summary of Changes

Hello @yzhao244, 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 enhancing the accuracy and consistency of the project's documentation by addressing minor spelling and capitalization errors. The changes ensure that key terms are presented uniformly, improving the overall quality and professional appearance of the user-facing guides and specifications.

Highlights

• Capitalization Fix: Corrected instances of 'a2a specification' to 'A2A specification' for proper capitalization and consistency across documentation.
• Spelling Correction: Fixed the spelling of 'Helloworld' to 'Hello World' in relevant tutorial files to improve readability and accuracy.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point by creating a comment using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands on the current page.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in pull request comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for Github and other Google products, sign up here.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

This pull request aims to correct spelling and capitalization in several documentation files. The changes to 'Helloworld' and 'a2a specification' are correct and improve consistency. However, I've identified a grammatical error introduced in docs/topics/a2a-and-mcp.md, where a verb was incorrectly changed to its singular form for a plural subject. I've provided a suggestion to revert this specific change. The rest of the changes look good.