Fix typo in documentation
Updated 'voculary' with 'vocabulary'.
@@ -357,7 +357,7 @@ class StringLookup(index_lookup.IndexLookup):
During `adapt()`, the layer will build a vocabulary of all string tokens
seen in the dataset, sorted by occurance count, with ties broken by sort
order of the tokens (high to low). At the end of `adapt()`, if `max_tokens`
- is set, the voculary wil be truncated to `max_tokens` size. For example,
+ is set, the vocabulary wil be truncated to `max_tokens` size. For example,
adapting a layer with `max_tokens=1000` will compute the 1000 most frequent
tokens occurring in the input dataset. If `output_mode='tf-idf'`, `adapt()`
will also learn the document frequencies of each token in the input dataset.
