Escape Click’s Wrapping in adk deploy agent_engine example

[ftnext]

Link to Issue or Description of Change

2. Or, if no issue exists, describe the change:

Problem:
adk deploy agent_engine help message loses newlines in docstring formatting

Solution:

Add \b on a line by itself before the formatted block

Testing Plan

This is format improvement of help message, so I think there is no need to add test case.

Unit Tests:

• I have added or updated unit tests for my change.
• All unit tests pass locally.

% pytest tests/unittests/cli  # Python 3.13.8
======================= 260 passed, 140 warnings in 7.73s ========================

Manual End-to-End (E2E) Tests:

Ran adk deploy agent_engine --help, then saw

  Example:

      # With Express Mode API Key
      adk deploy agent_engine --api_key=[api_key] my_agent

      # With Google Cloud Project and Region
      adk deploy agent_engine --project=[project] --region=[region]
        --display_name=[app_name] my_agent

Checklist

• I have read the CONTRIBUTING.md document.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have manually tested my changes end-to-end.
• Any dependent changes have been merged and published in downstream modules.

Additional context

Same solution as #4258

[gemini-code-assist]

Summary of Changes

Hello @ftnext, 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 resolves a display issue within the adk deploy agent_engine command's help output. Previously, the example commands were improperly formatted due to Click's text wrapping, leading to lost newlines. The change introduces specific escape characters to ensure the examples are presented clearly and as intended.

Highlights

• Click Help Message Formatting: Corrected the display of the adk deploy agent_engine command's help message by adding \b escape characters to prevent Click from incorrectly wrapping example lines and losing newlines.

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[gemini-code-assist]

Code Review

This pull request addresses a formatting issue in the adk deploy agent_engine command's help message where newlines were not being preserved. The fix involves adding \b markers to the docstring to prevent Click from re-wrapping the example code blocks. The change is correct, minimal, and consistent with the existing formatting conventions for help text in this file. The pull request is well-documented and ready to be merged.

[ryanaiagent]

Hi @ftnext , Thank you for your contribution! We appreciate you taking the time to submit this pull request. Your PR has been received by the team and is currently under review. We will provide feedback as soon as we have an update to share.

[ryanaiagent]

Hi @Jacksunwei , can you pls review this LGTM.