Explicitly call out dev-dependencies used in solutions · google/comprehensive-rust#1290

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説明

From https://github.com/google/comprehensive-rust/pull/1288#issuecomment-1743131185: the safe FFI wrapper solution does not actually work when you copy-paste it into a new Cargo project. The problem is that the unit tests rely on tempfile.

We need to fix this: I suggest adding some text to the solution which shows the cargo add commands to run. Alternatively, we could {{#include ...}} the Cargo.toml file — but I fear this will become messy since all solutions currently share a single Cargo.toml file. We could perhaps split them up further?

コントリビューターガイド

技術スタック: rust
領域: documentationdeveloper experiencetesting
Issue 種別: documentation
難度: 2
推定時間: under 1 hour
活動状況: fresh
明確さ: clear
前提条件: Rust basicsCargo dev dependencies
初心者向け度: 90
調査方針: Investigate the solution file at exercises/day 3/solutions afternoon.html and its Cargo.toml. The issue references PR #1288, which may contain discussion. Consider adding a note in the solution text listing the required `cargo add` commands for dev dependencies like tempfile. Alternatively, evaluate splitting the shared Cargo.toml to include per solution dev dependencies. Ensure the solution works when copy pasted into a new project.