Failure building PDF manual [trunk]

[Angelo Graziosi <angelo.graziosi@alice.it>]

With current trunk (r1003608), there is this failure:

make emacs.pdf
[...]
Underfull \hbox (badness 10000) in paragraph at lines 71--75
@textrm `@texttt /u2/emacs/src/../lisp/simple.el[]@textrm '[] is 
equiv-a-lent t
o `@texttt /u2/emacs/lisp/simple.el[]@textrm '[].
[27] [28] [29] [30] [31] [32]) (/tmp/emacs/doc/emacs/m-x.texi Chapter 6
[33] [34]) (/tmp/emacs/doc/emacs/help.texi Chapter 7 [35] [36] [37] [38]
[39] [40] [41] [42] [43]) (/tmp/emacs/doc/emacs/mark.texi Chapter 8 [44]
[45] [46] [47] [48]) (/tmp/emacs/doc/emacs/killing.texi Chapter 9 [49] [50]
[51] [52] [53] [54] [55] [56] [57]) (/tmp/emacs/doc/emacs/regs.texi 
Chapter 10
[58] [59] [60] [61]) (/tmp/emacs/doc/emacs/display.texi Chapter 11 [62]
[63] [64] [65] [66] [67] [68] [69] [70] [71] [72] [73] [74] [75] [76] [77])
(/tmp/emacs/doc/emacs/search.texi Chapter 12 [78] [79] [80] [81] [82] [83]
[84] [85] [86] [87] [88]
/tmp/emacs/doc/emacs/search.texi:927: Undefined control sequence.
<argument> [.?!][]\"'▒
                        ▒”)}]*^^M
@doverbatim #1^^M#2@end verbatim->#2
                                     @end verbatim
l.927 @end verbatim

?

Perhaps there are other recent .texi file which give similar problems.

That occurs on Cygwin and GNU/Linux Kubuntu (8.04, 10.10).

Ciao,
Angelo.