Problem with Tramp 2.5.2 (with emacs 28.1) when talking to Solaris

[Simon Matthews]

When attempting to browse directories on a Solaris remote host only the
home directory is shown.

This is due to passing the -w flag to ls:
/usr/xpg4/bin/ls --color=never -al -w /home/spm/some/dir/. 2>/dev/null

The Solaris variants of ls do support "-w" but it expects a parameter:
       -w cols
       --width cols

           Multi-column output where the column width is forced to cols.

It looks like this flag is the same no matter which variant of ls is used
(/usr/bin/ls, /usr/xpg4/bin/ls, /usr/xpg6/bin/ls).

Simon