add explanation of raw_text
@@ -135,7 +135,7 @@ process that are used when you run [`spacy train`](/api/cli#train).
| `dropout` | The dropout rate. Defaults to `0.1`. ~~float~~ |
| `accumulate_gradient` | Whether to divide the batch up into substeps. Defaults to `1`. ~~int~~ |
| `init_tok2vec` | Optional path to pretrained tok2vec weights created with [`spacy pretrain`](/api/cli#pretrain). Defaults to variable `${paths:init_tok2vec}`. ~~Optional[str]~~ |
-| `raw_text` | TODO: ... Defaults to variable `${paths:raw}`. ~~Optional[str]~~ |
+| `raw_text` | Optional path to a jsonl file with unlabelled text documents for a [rehearsel](/api/language#rehearse) step. Defaults to variable `${paths:raw}`. ~~Optional[str]~~ |
| `vectors` | Model name or path to model containing pretrained word vectors to use, e.g. created with [`init model`](/api/cli#init-model). Defaults to `null`. ~~Optional[str]~~ |
| `patience` | How many steps to continue without improvement in evaluation score. Defaults to `1600`. ~~int~~ |
| `max_epochs` | Maximum number of epochs to train for. Defaults to `0`. ~~int~~ |
