Truncated Transfer Docs

[AdinAck]

It looks like some documentation got cut short in dma::transfer:

/// Marker type for a transfer with a mutable source and backed by a
pub struct MutTransfer;
/// Marker type for a transfer with a constant source and backed by a
pub struct ConstTransfer;

Not sure what they were going to say... perhaps DMA channel?

[usbalbin]

https://github.com/stm32-rs/stm32g4xx-hal/blame/main/src/dma/transfer.rs#L14

[usbalbin]

Seems it was always this way