[Bug-AUCTeX] 11.84; TeX-clean signals error if deleting files is only one.

[Ikumi Keita]

Remember to cover the basics, that is, what you expected to happen and
what in fact did happen.

Be sure to consult the FAQ section in the manual before submitting
a bug report.  If the bug (or problem) is triggered by a specific
(La)TeX file, you should try to produce a minimal sample file
showing the problem and include it in your report.

Your bug report will be posted to the AUCTeX bug reporting list.
------------------------------------------------------------------------

TeX-clean stops with an error "Wrong type argument: sequencep, t" if the
number of the file to be deleted is only one.

How to reproduce:
0. rm -f aaa.*
1. touch aaa.tex aaa.log
2. Open aaa.tex with AUCTeX.
3. C-c C-c Clean RET

Analysis:
Again this is an Emacs 21 compatibility problem.  The following lines
are part of TeX-clean definition quoted from tex.el:
----------------------------------------------------------------------
                  (dired-mark-pop-up " *Deletions*" 'delete
                                     (if (> (length files) 1) 
                                         files
                                       (cons t files))
                                     'y-or-n-p "Delete files? "))
----------------------------------------------------------------------
It passes (cons t files) as the third argument for dired-mark-pop-up if
`files' consists of only one file.  However, dired-mark-pop-up of Emacs
21 does not accept such argument.

Emacs  : GNU Emacs 21.4.1 (i386-unknown-freebsd4.11, X toolkit, Xaw3d scroll 
bars, emcws)
 of 2005-03-02 on myname.my.domain
Package: 11.84

current state:
==============
(setq
 AUCTeX-date "2007-01-12"
 window-system 'x
 LaTeX-version "2e"
 TeX-style-path '("style" "auto" "/home/keita/tex/style"
                  "/home/keita/tex/auto"
                  "/usr/local/share/emacs/site-lisp/auctex/style"
                  "/usr/local/var/auctex")
 TeX-auto-save nil
 TeX-parse-self t
 TeX-master nil
 TeX-command-list '(("jTeX" "%(PDF)jtex %`%S%(PDFout)%(mode)%' %t" TeX-run-TeX
                     nil (plain-tex-mode) :help "Run NTT jTeX")
                    ("jLaTeX" "%(PDF)jlatex %`%S%(PDFout)%(mode)%' %t"
                     TeX-run-TeX nil (latex-mode) :help "Run NTT jLaTeX")
                    ("pTeX" "%(PDF)ptex %`%S%(PDFout)%(mode)%' %t" TeX-run-TeX
                     nil (plain-tex-mode) :help "Run ASCII pTeX")
                    ("pLaTeX" "%(PDF)platex %`%S%(PDFout)%(mode)%' %t"
                     TeX-run-TeX nil (latex-mode) :help "Run ASCII pLaTeX")
                    ("Mendex" "mendex %s" TeX-run-command nil t :help
                     "Create index file with mendex")
                    ("jBibTeX" "jbibtex %s" TeX-run-BibTeX nil t :help
                     "Run jBibTeX")
                    ("-" "" ignore nil t)
                    ("TeX" "%(PDF)%(tex) %`%S%(PDFout)%(mode)%' %t"
                     TeX-run-TeX nil
                     (plain-tex-mode ams-tex-mode texinfo-mode) :help
                     "Run plain TeX")
                    ("LaTeX" "%`%l%(mode)%' %t" TeX-run-TeX nil
                     (latex-mode doctex-mode) :help "Run LaTeX")
                    ("Makeinfo" "makeinfo %t" TeX-run-compile nil
                     (texinfo-mode) :help "Run Makeinfo with Info output")
                    ("Makeinfo HTML" "makeinfo --html %t" TeX-run-compile nil
                     (texinfo-mode) :help "Run Makeinfo with HTML output")
                    ("AmSTeX" "%(PDF)amstex %`%S%(PDFout)%(mode)%' %t"
                     TeX-run-TeX nil (ams-tex-mode) :help "Run AMSTeX")
                    ("ConTeXt" "texexec --once --texutil %(execopts)%t"
                     TeX-run-TeX nil (context-mode) :help "Run ConTeXt once")
                    ("ConTeXt Full" "texexec %(execopts)%t" TeX-run-TeX nil
                     (context-mode) :help "Run ConTeXt until completion")
                    ("BibTeX" "bibtex %s" TeX-run-BibTeX nil t :help
                     "Run BibTeX")
                    ("View" "%V" TeX-run-discard t t :help "Run Viewer")
                    ("Print" "%p" TeX-run-command t t :help "Print the file")
                    ("Queue" "%q" TeX-run-background nil t :help
                     "View the printer queue" :visible TeX-queue-command)
                    ("File" "%(o?)dvips %d -o %f " TeX-run-command t t :help
                     "Generate PostScript file")
                    ("Index" "makeindex %s" TeX-run-command nil t :help
                     "Create index file")
                    ("Check" "lacheck %s" TeX-run-compile nil (latex-mode)
                     :help "Check LaTeX file for correctness")
                    ("Spell" "(TeX-ispell-document \"\")" TeX-run-function nil
                     t :help "Spell-check the document")
                    ("Clean" "TeX-clean" TeX-run-function nil t :help
                     "Delete generated intermediate files")
                    ("Clean All" "(TeX-clean t)" TeX-run-function nil t :help
                     "Delete generated intermediate and output files")
                    ("Other" "" TeX-run-command t t :help
                     "Run an arbitrary command")
                    )
 )