Bump synctex to 1.21

  $ cd cut-n-paste/synctex
  $ rm synctex_*
  $ ./update-synctex-from-TL.sh

Test on Fedora:

  1. Install required packages
     $ sudo dnf install texlive-scheme-basic texlive-lipsum -y

  2. Build a pdf with synctex enabled
     $ cat <<EOF >> file.tex
\documentclass[12pt]{report}
\usepackage{lipsum}
\begin{document}
\chapter{Introduction}
\lipsum[2-4]
\end{document}
EOF
     $ pdflatex -synctex=1 file.tex

   3. Open file.pdf using atril

   4. Search any text string

1 files changed, 2 insertions, 2 deletions

diff --git a/cut-n-paste/synctex/update-synctex-from-TL.sh b/cut-n-paste/synctex/update-synctex-from-TL.sh
index ca0e10bf..4d8af0e3 100755
--- a/cut-n-paste/synctex/update-synctex-from-TL.sh
+++ b/cut-n-paste/synctex/update-synctex-from-TL.sh
@@ -4,10 +4,10 @@
 # Get latest synctex parser from TexLive SVN repository.
 SVN_URI=svn://tug.org/texlive/trunk/Build/source/texk/web2c/synctexdir
 SCRIPT_NAME=update-synctex-from-TL.sh
-FILES="synctex_parser_version.txt synctex_parser.c  synctex_parser.h  synctex_parser_local.h  synctex_parser_utils.c  synctex_parser_utils.h"
+FILES="synctex_parser.c synctex_parser.h synctex_parser_advanced.h synctex_parser_local.h synctex_parser_readme.md synctex_parser_readme.txt synctex_parser_utils.c synctex_parser_utils.h synctex_parser_version.txt synctex_version.h"
 
   echo "Obtaining latest version of the sources"
-  for FILE in $FILES 
+  for FILE in $FILES
   do
     svn export $SVN_URI/$FILE
   done