Fix renaming references to scripts escaping pattern chars in entities

34aeb6f3 applied escapegsub() to the old script name, because the code to rename references to scripts needed to use <string>:gsub() on script lines. However, this escaped version was also being used when it was just directly comparing the data attribute of script boxes and terminals to see if they referenced the old script name, making this an unnecessary use of escapegsub() for those cases. This has been fixed now.