Fix Docs to mention that anchor-spl/idl needs to be added to idl-build in cargo.toml

[psalm842]

Issue

Users get an error when trying to compile the example on the accounts struct documentation page (docs/src/pages/docs/the-accounts-struct.md) shown below:

#[derive(Accounts)]
pub struct SetData<'info> {
    #[account(mut)]
    pub my_account: Account<'info, MyAccount>,
    #[account(
        constraint = my_account.mint == token_account.mint,
        has_one = owner
    )]
    pub token_account: Account<'info, TokenAccount>,
    pub owner: Signer<'info>
}

Generated Error

Resolution

The documentation mentions that anchor-spl must be added to the dependencies section of cargo.toml but fails to mention that you also need to add "anchor-spl/idl-build" to the idl-build list in the Cargo.toml.

This issue was identified and answered on stack overflow but it would be best if it was just in the documentation to begin with.