or download this
#perl
use strict;
...
This is `my <string>` that I want to modify because the angle brack
+et is between backticks
This is `a <string> I don't want to modify because it's not between ba
+ckticks
This is \`another <left_angle_bracket>`I don't want to modify because
+the first backtick is escaped but I do want to modify <the_last_left_
+angle_bracket>` between the backticks