[Doc]: Data parameter description is not always replaced #21135

Documentation Link

https://matplotlib.org/devdocs/search.html?q=++++DATA_PARAMETER_PLACEHOLDER

Problem

Generating the data parameter description does not work properly for a number of functions

This search should be empty:
https://matplotlib.org/devdocs/search.html?q=++++DATA_PARAMETER_PLACEHOLDER

The replacement of this placeholder is done through the @_preprocess_data decorator. This does not work if

• the function accepts data but does not use the decorator, because the resolution is deferrd; e.g. in semilogx
• or if the docstring is added to the function afterwards, e.g. in quiver

Suggested improvement

Reformatting the docstring should be extracted into an isolated function(s)

@fill_data_parameter_placeholder
def semilogx():

and

def quiver():
    ....
quiver.__doc__ = fill_data_parameter_placeholder(QUIVER_DOC)

Matplotlib Version

3.5.x

Matplotlib documentation version

3.5.x