bug#65431: 30.0.50; pcomplete should not quote everything in a file name

[Michael Albinus]

- emacs -Q -l tramp --eval "(tramp-change-syntax 'separate)" -f eshell

- Type "cd /[ssh/localho TAB"

- This expands to "cd /[ssh/localhost\]"

Due to the quoted right square bracket, the cd command fails. pcomplete
should be taught to not quote everything in a file name.

Best regards, Michael.

In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.38, cairo version 1.17.8) of 2023-08-15 built on gandalf
Repository revision: 5c101b1adac2b4f3cc4e08a6492b406952c529f3
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12201009
System Description: Fedora Linux 38 (Workstation Edition)

Configured using:
 'configure --with-tree-sitter'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
LIBOTF LIBSELINUX LIBXML2 M17N_FLT MODULES NOTIFY INOTIFY PDUMPER PNG
RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER
X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB

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Major mode: Group

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