Escape the characters in a string. In strescape syntax, str is an input string, charsToEscapeStr is a string of chars that will be escaped when found in str, and escapeStr is a one character string that is used as the escape character.
returnedString = strescape(str, charsToEscapeStr, escapeStr)
returnedString - type: str
str - type: str
charsToEscapeStr - type: str
escapeStr - type: str
Escaping adds the escape character before each instance of the characters to escape.