Removes escaping of square brackets

Escaping square brackets seems to create problems converting certain files.
If this breaks conversion of other files, the cause must be investigated.

src/main/java/net/knarcraft/ffmpegconverter/converter/Converter.java

@@ -427,9 +427,9 @@ public abstract class Converter {
     static String escapeSpecialCharactersInFileName(String fileName) {
         return fileName.replace("'", "\\\\\\'")
                 .replace(",", "\\\\\\,")
-                .replace(";", "\\\\\\;")
-                .replace("]", "\\]")
-                .replace("[", "\\[");
+                .replace(";", "\\\\\\;");
+                /*.replace("]", "\\]") //Not sure whether these should be escaped or not
+                .replace("[", "\\[");*/
     }
     
     static void print(String input) throws IOException {