Document new type -p support for functions

Author: mqudsi

doc_src/type.txt

@@ -17,7 +17,7 @@ The following options are available:
 
 - `-t` or `--type` prints `function`, `builtin`, or `file` if `NAME` is a shell function, builtin, or disk file, respectively.
 
-- `-p` or `--path` returns the name of the disk file that would be executed, or nothing if `type  -t  name` would not return `file`.
+- `-p` or `--path` prints the path to `NAME` if `NAME` resolves to an executable file in <tt>$PATH</tt>, the path to the script containing the definition of the function `NAME` if `NAME` resolves to a function loaded from a file on disk (i.e. not interactively defined at the prompt), or nothing otherwise.
 
 - `-P` or `--force-path` returns the path to the executable file `NAME`, presuming `NAME` is found in <tt>$PATH</tt>, or nothing otherwise. `--force-path` explicitly resolves only the path to executable files in <tt>$PATH</tt>, regardless of whether `$NAME` is shadowed by a function or builtin with the same name.