@CalcMgrReplaceFirst
Purpose:
Replaces the first substring of this string that matches the given regular expression with the given replacement.
For the regular expression, see the Java documentation for java.util.regex.Pattern
Syntax:
Java Class: com.hyperion.calcmgr.common.cdf.StringFunctions.replaceFirst(String,String,String)
CDF Spec: @CalcMgrReplaceFirst(text, regExpr, replacement)