Merge pull request #7139 from marmelab/fix-inputs-docs

[Doc] Fix inputs initialValue description

Author: djhi

docs/Inputs.md

@@ -47,8 +47,8 @@ All input components accept the following props:
 React-admin uses [react-final-form](https://final-form.org/docs/react-final-form/getting-started) to control form inputs. Each input component also accepts all react-final-form [FieldProps](https://final-form.org/docs/react-final-form/types/FieldProps), including:
 
 | Prop           | Required | Type       | Default | Description                                                                                                                                                                                                     |
-| -------------- | -------- | ---------- | ------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| `initialValue` | Optional | `mixed`    | -       | Value to be set when the property is `null` or `undefined`                                                                                                                                                      |
+| -------------- | -------- | ---------- | ------- |-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `initialValue` | Optional | `mixed`    | -       | Value to be set when the property is `undefined`                                                                                                                                                                |
 | `format`       | Optional | `Function` | -       | Callback taking the value from the form state and the name of the field, and returns the input value. See the [Transforming Input Value](./Inputs.md#transforming-input-value-tofrom-record) section.           |
 | `parse`        | Optional | `Function` | -       | Callback taking the input value and name of the field, and returns the value you want stored in the form state. See the [Transforming Input Value](./Inputs.md#transforming-input-value-tofrom-record) section. |