Page Comparison

var modifiedBody = body;
var bodyDelimiters = ["Your expression 1", "Your expression 2"];

//These correspond to the flags mentioned in https://docs.oracle.com/javase/tutorial/essential/regex/pattern.html
var dotAllFlag = 0x20;
var multilineFlag = 0x08;
var unicodeCaseFlag= 0x40;

//Add the desired flags here 
var regexpFlags = dotAllFlag | multilineFlag | unicodeCaseFlag

print('Number of body delimiters [' + bodyDelimiters.length + '].');

//Each delimeter is processed in this for loop
for (var i = 0; i < bodyDelimiters.length; i++) 
{
    var aBodyDelimiter= bodyDelimiters[i];
    print('Processing the following delimiter [' + aBodyDelimiter + '].');
    var matcherClass =  Java.type("java.util.regex.Matcher");
    var quotedBody = matcherClass.quoteReplacement(modifiedBody);
    var pattern = Java.type("java.util.regex.Pattern").compile(aBodyDelimiter, regexpFlags);
    var matcher = pattern.matcher(quotedBody);
    
    if(matcher.find())
    {
        var startIndex = matcher.start();
        
        //If the expression applied to the body(comment or summary of the issue) results in empty then prevent the expression from applying (determine if you want this behaviour NOTE: if comment is empty then no comment is added to the issue.)
        if(startIndex === 0)
        {
            print('Body Delimiter expression [' + aBodyDelimiter + '] would remove all content! Ignoring this Delimiter')
        }
        //Actually applying the expression to the body
        else
        {
            print('Body Delimiter expression [' + aBodyDelimiter + '] was applied!')
            var sub = quotedBody.substring(0, startIndex);
            
            if(quotedBody.length() > body.length())
            {
              sub = quotedBody.replace("\\\\", "\\").replace("\\$", "$");
            }
            
            modifiedBody = sub;
            
            //condition for create and commenting remove either/none depending on your requirements
            if(relatedIssue)
            {
              resultMap.put("comment", modifiedBody);
            }
            else
            {
              result.put("summarydescription", modifiedBody);
            }
            
            print('[' + aBodyDelimiter + '] result was [' + modifiedBody + ']');
        }
    }
}