fixed option --operators displaying wrong description lines

src/modules.cc

@@ -650,7 +650,7 @@ get_operator_description(const std::string &p_current_op_name, const std::vector
           line = help.at(++operator_section);
         }
       // if operator line found save description for later use
-      if (!line.empty() && line.find(p_current_op_name + " ") != std::string::npos)
+      if (!line.empty() && line.find("    " + p_current_op_name + " ") != std::string::npos)
         {
           auto op_name_start = line.find_first_not_of(" \t");