Function to escape meta characters #408
Description
.^$\|*+?{}[](), derived from https://unicode-org.github.io/icu/userguide/strings/regexp.html#regular-expression-metacharacters
{{ message }}
.^$\|*+?{}[](), derived from https://unicode-org.github.io/icu/userguide/strings/regexp.html#regular-expression-metacharacters