bug#41861: 27.0.91; `tabulated-list-mode': No sort-direction indicator for

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bug#41861: 27.0.91; `tabulated-list-mode': No sort-direction indicator for

Drew Adams
 rightmost column
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Use `buffer-menu'.  Click column-header `File', to sort by that column.
There is no sort-direction indicator,
`tabulated-list-gui-sort-indicator-(asc|desc)'.  There should be one,
whenever, as in this case, the column content is wider than one char.

This is a failing of the design of `tabulated-list-init-header'.  It's
often the case that some columns that are not limited in width to one
char have a `tabulated-list-format' whose second element is 1.  For
column `File' this is ("File" 1 t), for instance.  It's wrong for
`tabulated-list-init-header' to rely on that `1' to indicate whether
there's room for a sort indicator.

In GNU Emacs 27.0.91 (build 1, x86_64-w64-mingw32)
 of 2020-04-20
Repository revision: c36c5a3dedbb2e0349be1b6c3b7567ea7b594f1c
Windowing system distributor `Microsoft Corp.', version 10.0.18362
Configured using:
 `configure --without-dbus --host=3Dx86_64-w64-mingw32
 --without-compress-install 'CFLAGS=3D-O2 -static''