message: Correct docstring in IndexLookup.
diff: @@ -46,7 +46,7 @@ class IndexLookup(base_preprocessing_layer.CombinerPreprocessingLayer):
  This layer translates a set of arbitrary hashables into an integer output via
  a table-based lookup, with optional out-of-vocabulary handling. This is the
  - basis layer for both IntegerLookup and IndexLookup; it holds the common
  + basis layer for both IntegerLookup and StringLookup; it holds the common
  logic but is not intended to be exported as part of the Keras API.
  If desired, the user can call this layer's `adapt()` method on a data set,
  