add note on submodules
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@ -97,7 +97,16 @@ You can just do a normal git clone:
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git clone https://github.com/rust-lang/rust.git
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git clone https://github.com/rust-lang/rust.git
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```
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```
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You don't need to clone the submodules at this time.
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You don't need to clone the submodules at this time. But if you want to, you
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can do the following:
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```sh
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# first time
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git submodule update --init --recursive
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# subsequent times (to pull new commits)
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git submodule update
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```
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**Pro tip**: if you contribute often, you may want to look at the git worktrees
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**Pro tip**: if you contribute often, you may want to look at the git worktrees
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tip in [this chapter][suggested].
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tip in [this chapter][suggested].
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