Fixed submodules exercise to work with newer git versions

[vivekveerappan]

Fix Git submodule lesson

Summary

The command git submodule add ../remote include fails as newer git versions block file protocol by default
git -c protocol.file.allow=always is a temporary one-time override for just this command.

Summary by CodeRabbit

• Documentation
  • Updated the submodule setup instructions to use a one-time Git command override that allows the file protocol on newer Git versions by default.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: cee7b547-5f65-4ff2-906b-b76380a99028

📥 Commits

Reviewing files that changed from the base of the PR and between 4eb326e and 4dcacf9.

📒 Files selected for processing (1)

• submodules/README.md

✅ Files skipped from review due to trivial changes (1)

• submodules/README.md

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Walkthrough

The submodules/README.md exercise instruction for adding a submodule is updated to prepend a -c protocol.file.allow=always Git config override to the git submodule add command, along with a note explaining that newer Git versions block the file protocol by default.

Changes

Submodule Exercise README Fix

Layer / File(s)	Summary
Add protocol.file.allow=always override submodules/README.md	The git submodule add command is replaced with git -c protocol.file.allow=always submodule add, and a note is added explaining that newer Git versions block the file protocol by default.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A rabbit once tried to add a submodule with glee,
But newer Git versions said, "No file protocol for free!"
So a tiny -c flag was tucked in just right,
protocol.file.allow=always — now the command works bright.
Hop hop, the exercise runs smooth once more! 🎉

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: fixing a submodules exercise for compatibility with newer Git versions that block the file protocol by default.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@submodules/README.md`:
- Around line 22-23: The git command in the submodule addition instruction
contains a syntax error where `git-c` appears instead of `git -c` (note the
space instead of hyphen). Correct this typo by changing `git-c
protocol.file.allow=always` to `git -c protocol.file.allow=always` in the
README.md file so the command will execute properly.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 03adc5b3-6afb-4c1c-8639-df1d4d758aec

📥 Commits

Reviewing files that changed from the base of the PR and between 7d2c18f and 4eb326e.

📒 Files selected for processing (1)

• submodules/README.md