fix docstrings; improve their consistency

nicegui/elements/input.py

@@ -35,7 +35,7 @@ class Input(ValidationElement, DisableableElement):
         :param password_toggle_button: whether to show a button to toggle the password visibility (default: False)
         :param on_change: callback to execute when the value changes
         :param autocomplete: optional list of strings for autocompletion
-        :param validation: dictionary of validation rules, executed in dict order. e.g. ``{'Too long!': lambda value: len(value) < 3}``
+        :param validation: dictionary of validation rules, e.g. ``{'Too long!': lambda value: len(value) < 3}``
         """
         super().__init__(tag='q-input', value=value, on_value_change=on_change, validation=validation)
         if label is not None:

nicegui/elements/number.py

@@ -37,7 +37,7 @@ class Number(ValidationElement, DisableableElement):
         :param suffix: a suffix to append to the displayed value
         :param format: a string like "%.2f" to format the displayed value
         :param on_change: callback to execute when the value changes
-        :param validation: dictionary of validation rules, e.g. ``{'Too small!': lambda value: value < 3}``
+        :param validation: dictionary of validation rules, e.g. ``{'Too large!': lambda value: value < 3}``
         """
         self.format = format
         super().__init__(tag='q-input', value=value, on_value_change=on_change, validation=validation)

nicegui/elements/textarea.py

@@ -17,11 +17,14 @@ class Textarea(Input):
         This element is based on Quasar's `QInput <https://quasar.dev/vue-components/input>`_ component.
         The ``type`` is set to ``textarea`` to create a multi-line text input.
 
+        You can use the `validation` parameter to define a dictionary of validation rules.
+        The key of the first rule that fails will be displayed as an error message.
+
         :param label: displayed name for the textarea
         :param placeholder: text to show if no value is entered
         :param value: the initial value of the field
         :param on_change: callback to execute when the value changes
-        :param validation: dictionary of validation rules, e.g. ``{'Too short!': lambda value: len(value) < 3}``
+        :param validation: dictionary of validation rules, e.g. ``{'Too long!': lambda value: len(value) < 3}``
         """
         super().__init__(label, placeholder=placeholder, value=value, on_change=on_change, validation=validation)
         self._props['type'] = 'textarea'