How to remove non printable characters

I'm looking for a function that will remove new line characters etc from a string.

I tried formatString in a java script operator but get an error.

' Process.myString is " Test \n"

Process.myString2=formatString(" %s/n",Process.myString);

I get this error:

-- Can't find method com.optinuity.c2o.bean.C2OLibrary.formatString(string,string). (c2ojslib.js#1)

myString.trim(); also doesn't work.