This function escapes metacharacter, the characters that have special
meaning to the regular expression engine. In most cases you are better
off using fixed() since it is faster, but str_escape() is useful
if you are composing user provided strings into a pattern.
Usage
str_escape(string)
Value
A character vector the same length as string.
Arguments
string
Input vector. Either a character vector, or something
coercible to one.