fish-shell/doc_src/funced.txt

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\section funced funced - edit a function interactively
\subsection funced-synopsis Synopsis
<code>funced [OPTIONS] NAME</code>
\subsection funced-description Description
\c funced provides an interface to edit the definition of the function
<code>NAME</code>.
If the \c $EDITOR environment variable is set, it will be used as the program
to edit the function. Otherwise, a built-in editor will be used.
If there is no function called \c NAME a new function will be created with
the specified name
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- <code>-e command</code> or <code>--editor command</code> Open the function
body inside the text editor given by the command (for example, "vi"). The
command 'fish' will use the built-in editor.
- <code>-i</code> or <code>--interactive</code> Open function body in the
built-in editor.