re: fleacollar.sh script made a bad configuration

I have been told by the author that the script is old enough now it needs 
rewriting.
I used an app password and got into gmail and handled some messages.
line 18 of muttrc file that follows had error preceeding regular expression.
I can't figure why since everything appears clean in the file.

cut here.
set editor=nano
set text_flowed=yes
set send_charset=us-ascii:utf-8
set pager = 'builtin'
set pager_stop = 'yes'
set sort=threads
set beep_new=yes
set print=yes
set imap_check_subscribed
set sort_alias=alias
set reverse_alias=yes
set alias_file=~/.mutt/aliases
source ~/.mutt/aliases
set history_file=~/.mutt/history
set history=1024
set mailcap_path=~/.mutt/mailcap
set header_cache=~/.mutt/cache/headers
set message_cachedir=~/.mutt/cache/bodies
set certificate_file=~/.mutt/certificates
set markers=no
unset mark_old
auto_view text/html
alternative_order text/plain text/enriched text/html
message-hook '!(~g|~G) ~b"^ 5 dash charactersBEGIN\ PGP\ (SIGNED\ )?MESSAGE"' "exec check-traditional-pgp"
source ~/.mutt/gpg.rc
source ~/.mutt/macros
macro generic,index <F1> '<sync-mailbox><enter-command>source ~/.mutt/[email protected]<enter><change-folder>!<enter>'
source ~/.mutt/[email protected]

cut here.
Here is output from mutt -v
cut here.
Mutt 2.2.12 (2023-09-09)
Copyright (C) 1996-2023 Michael R. Elkins and others.
Mutt comes with ABSOLUTELY NO WARRANTY; for details type `mutt -vv'.
Mutt is free software, and you are welcome to redistribute it
under certain conditions; type `mutt -vv' for details.

System: Linux 6.6.56-05934-gf790fe104dba (x86_64)
ncurses: ncurses 6.4.20221231 (compiled with 6.4)
libidn2: 2.3.3 (compiled with 2.3.3)
hcache backend: tokyocabinet 1.4.48

Compiler:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/12/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 12.2.0-14' --with-bugurl=file:///usr/share/doc/gcc-12/README.Bugs --enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-12 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --enable-libphobos-checking=release --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --enable-cet --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-12-bTRWOB/gcc-12-12.2.0/debian/tmp-nvptx/usr,amdgcn-amdhsa=/build/gcc-12-bTRWOB/gcc-12-12.2.0/debian/tmp-gcn/usr --enable-offload-defaulted --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.2.0 (Debian 12.2.0-14) 

Configure options: --build=x86_64-linux-gnu --prefix=/usr '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' --sysconfdir=/etc --localstatedir=/var --disable-option-checking --disable-silent-rules '--libdir=${prefix}/lib/x86_64-linux-gnu' --runstatedir=/run --disable-maintainer-mode --disable-dependency-tracking --with-mailpath=/var/mail --enable-compressed --enable-debug --enable-fcntl --enable-hcache --enable-gpgme --enable-imap --enable-smtp --enable-pop --enable-sidebar --enable-dotlock --disable-fmemopen --with-curses --with-gnutls --with-gss --with-idn2 --with-mixmaster --with-gsasl --without-gdbm --without-bdb --without-qdbm --with-tokyocabinet build_alias=x86_64-linux-gnu 'CFLAGS=-g -O2 -ffile-prefix-map=/build/reproducible-path/mutt-2.2.12=. -fstack-protector-strong -Wformat -Werror=format-security' 'LDFLAGS=-Wl,-z,relro -Wl,-z,now' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2'

Compilation CFLAGS: -Wall -pedantic -Wno-long-long -g -O2 -ffile-prefix-map=/build/reproducible-path/mutt-2.2.12=. -fstack-protector-strong -Wformat -Werror=format-security

Compile options:
-DOMAIN
+DEBUG
-HOMESPOOL  +USE_SETGID  +USE_DOTLOCK  +DL_STANDALONE  +USE_FCNTL  -USE_FLOCK   
+USE_POP  +USE_IMAP  +USE_SMTP  
-USE_SSL_OPENSSL  +USE_SSL_GNUTLS  -USE_SASL  +USE_GSASL  +USE_GSS  +HAVE_GETADDRINFO  
+HAVE_REGCOMP  -USE_GNU_REGEX  
+HAVE_COLOR  +HAVE_START_COLOR  +HAVE_TYPEAHEAD  +HAVE_BKGDSET  
+HAVE_CURS_SET  +HAVE_META  +HAVE_RESIZETERM  +HAVE_FUTIMENS  
+CRYPT_BACKEND_CLASSIC_PGP  +CRYPT_BACKEND_CLASSIC_SMIME  +CRYPT_BACKEND_GPGME  
-EXACT_ADDRESS  -SUN_ATTACHMENT  
+ENABLE_NLS  -LOCALES_HACK  +HAVE_WC_FUNCS  +HAVE_LANGINFO_CODESET  +HAVE_LANGINFO_YESEXPR  
+HAVE_ICONV  -ICONV_NONTRANS  -HAVE_LIBIDN  +HAVE_LIBIDN2  +HAVE_GETSID  +USE_HCACHE  
+USE_SIDEBAR  +USE_COMPRESSED  +USE_INOTIFY  
-ISPELL
SENDMAIL="/usr/sbin/sendmail"
MAILPATH="/var/mail"
PKGDATADIR="/usr/share/mutt"
SYSCONFDIR="/etc"
EXECSHELL="/bin/sh"
MIXMASTER="mixmaster"

To contact the developers, please mail to <[email protected]>.
To report a bug, please contact the Mutt maintainers via gitlab:
    https://gitlab.com/muttmua/mutt/issues