Fix string escape (#3468)

tools/ci4-lang-migration/convert.php

@@ -5,7 +5,7 @@ include($argv[1]);
 echo "<?php\n";
 echo "return [\n";
 foreach ($lang as $key=>$value) {
-    echo "\t\"$key\" => \"$value\",\n";
+    echo "\t\"$key\" => \"".addcslashes($value, '"')."\",\n";
 }
 echo "];";
 ?>

tools/ci4-lang-migration/convert.sh

@@ -15,3 +15,4 @@ for file in $projectdir/application/language/**/*.php; do
     sed -i "s/\(\s*\)\"${prefix}_/\1\"/g" $output
 done
 rm -rf "$projectdir/application"
+git add $projectdir/application/language