bug#44594: tabulated-list-mode: column header needlessly truncated

[Stefan Kangas]

Severity: minor

The column header in tabulated-list-mode is needlessly truncated.

Steps to reproduce:

0. emacs -Q
1. M-x list-buffers RET
2. C-x o
3. C-4 C-f
4. C-1 C-4 {

Result: The header is truncated to "Buff..." even though there is enough
space to show it all.

Expected result: The header is not truncated.

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Here is a list of commands where this could be tested:

list-buffers, list-bookmarks, list-packages, list-processes,
list-dynamic-libraries, org-lint and flymake-diagnostics-buffer-mode