REPLACE

Command: #replace {variable} {oldtext} {newtext}

         Searches the given variable, replacing each occurrence of 'oldtext'
         with 'newtext'. The 'oldtext' argument is a regular expression.

         Variables are stored in &1 to &99 with &0 holding the entire matched
         substring.

Example: #function rnd #math result 1d9;#replace test {%.} {@rnd{}}

Related: cat, format, function, local, math, script and variable.