tracker issue : CF-3753710

Problem Description: Code that relies on myStr.replace(a,b) to support a possibly being an empty string now breaks.

Steps to Reproduce:

<cfset s = "SOMETHING">
<cfset a = "">
<cfoutput>#s.replace(a,"")#</cfoutput>

Actual Result: Exception: Argument 2 of function Replace cannot be an empty value.

Expected Result: Should output SOMETHING like it did in all prior versions of ACF (and like it does in Railo, even current versions that support string member functions).

Any Workarounds: Add ugly conditional code to handle empty strings.

Several issues here:

1. The reason folks used s.replace() in the first place was because replace(s,"","") fails because it arbitrarily rejects the second argument being an empty string, whereas the underlying java.lang.String::replace() method is perfectly happy with an empty string.

2. The exception is very misleading - and I bet this applies to all member functions - because the argument numbers refer to the original Built-In Functions, not the member functions. In this case "Argument 2" is actually the _first_ argument to s.replace() and "Argument 3" would be the _second_ argument.

3. This shows you didn't even try to test this will FW/1 - one of the most popular CFML frameworks out there - because out of the box, several examples fail because they contain expressions like this (to account for the optional context root in Java web applications):

	variables.framework = {
		base = getDirectoryFromPath( CGI.SCRIPT_NAME ).replace( getContextRoot(), '' ) & 'introduction'
	};

----------------------------- Additional Watson Details -----------------------------

Watson Bug ID:	3753710

External Customer Info:
External Company:  
External Customer Name: SeanACorfield
External Customer Email:  
External Test Config: My Hardware and Environment details:

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