bug#64584: 29.0.91; skeleton: cannot pass `str' as argument to some functions

[Visuwesh]

In a skeleton template, it is not possible to pass `str' as an argument
to some functions.  To reproduce:

    1. emacs -Q

    2. Evaluate the following skeletons:

    (define-skeleton test-skeleton ""
      (file-relative-name (read-file-name "P: "))
      (shell-quote-argument str))

    (define-skeleton test-skeleton-2 ""
      (file-relative-name (read-file-name "P: "))
      (identity str))

    3. M-x test-skeleton RET RET -- witness it signal an error

    4. M-x test-skeleton-2 RET RET -- witness it insert "./"

I was able to reduce the problem down to the follwing sexp by edebbuging
skeleton-internal-1 (specifically the last `t' case in the cond signals
the error):

    (dlet ((str `(setq str "test"))
           (e `(shell-quote-argument str)))
      (eval e))

In GNU Emacs 29.0.91 (build 11, x86_64-pc-linux-gnu, X toolkit, Xaw
 scroll bars) of 2023-07-12 built on astatine
Repository revision: 17c7915ab947ebeec6ea5ad3eb4cad1f24d5d4fc
Repository branch: emacs-29
Windowing system distributor 'The X.Org Foundation', version 11.0.12101007
System Description: Debian GNU/Linux trixie/sid

Configured using:
 'configure --with-sound=alsa --with-x-toolkit=lucid --with-json
 --without-xaw3d --without-gconf --without-libsystemd --without-cairo'

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

Important settings:
  value of $LC_MONETARY: ta_IN.UTF-8
  value of $LC_NUMERIC: ta_IN.UTF-8
  value of $LANG: en_GB.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
None found.

Features:
(shadow sort help-mode emacsbug mail-extr message sendmail mailcap
yank-media puny dired dired-loaddefs rfc822 mml mml-sec password-cache
epa derived epg rfc6068 epg-config gnus-util text-property-search
time-date subr-x mm-decode mm-bodies mm-encode mail-parse rfc2231
rfc2047 rfc2045 mm-util ietf-drums mail-prsvr mailabbrev mail-utils
gmm-utils mailheader cl-loaddefs cl-lib skeleton rmc iso-transl tooltip
cconv eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type
elisp-mode mwheel term/x-win x-win term/common-win x-dnd tool-bar dnd
fontset image regexp-opt fringe tabulated-list replace newcomment
text-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow
isearch easymenu timer select scroll-bar mouse jit-lock font-lock syntax
font-core term/tty-colors frame minibuffer nadvice seq simple cl-generic
indonesian philippine cham georgian utf-8-lang misc-lang vietnamese
tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek
romanian slovak czech european ethiopic indian cyrillic chinese
composite emoji-zwj charscript charprop case-table epa-hook
jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs
theme-loaddefs faces cus-face macroexp files window text-properties
overlay sha1 md5 base64 format env code-pages mule custom widget keymap
hashtable-print-readable backquote threads dbusbind inotify
dynamic-setting system-font-setting font-render-setting x-toolkit
xinput2 x multi-tty make-network-process emacs)

Memory information:
((conses 16 41879 11878)
 (symbols 48 5521 1)
 (strings 32 14721 2050)
 (string-bytes 1 393181)
 (vectors 16 10382)
 (vector-slots 8 158438 14259)
 (floats 8 44 14)
 (intervals 56 314 11)
 (buffers 976 13))