Currently I am appending a string `str` to the documentation of a function `myfun` using

(put myfun 'function-documentation

       (concat

          (documentation myfun t)

           str)

Whilst the strategy works, this requires adding `str` after the function `myfun` has been defined.

Does there exist the possibility to add `str` directly inside the docstring of the function when I am

defining the function itself, avoiding the `(put` command mentio ned earlier after the implementation

of the function myfun?