Entries displayed in the current Tabulated List buffer.
This should be either a function, or a list.
If a list, each element has the form (ID [DESC1 ... DESCN]),
where:
- ID is nil, or a Lisp object uniquely identifying this entry,
which is used to keep the cursor on the "same" entry when
rearranging the list. Comparison is done with `equal'.
- Each DESC is a column descriptor, one for each column
specified in `tabulated-list-format'. A descriptor is either
a string, which is printed as-is, or a list (LABEL . PROPS),
which means to use `insert-text-button' to insert a text
button with label LABEL and button properties PROPS.
The string, or button label, must not contain any newline.
If `tabulated-list-entries' is a function, it is called with no
arguments and must return a list of the above form.