As hierdie geaktiveer is, sal jou patroon onveranderd na grep( 1) deurgegee word. As hierdie nie geaktiveer is nie, sal alle karakters wat nie letters is nie deur 'backslash' karakters ge' escape 'word. Dit sal verhoed dat grep hulle as deel van die uitdrukking interpreteer
If this is enabled, your pattern will be passed unmodified to grep(1). Otherwise, all characters that are not letters will be escaped using a backslash character to prevent grep from interpreting them as part of the expression.