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 $ perldoc perlfunc | egrep '^ {7}[a-z]+ STR'
       index STR,SUBSTR,POSITION
       index STR,SUBSTR
       rindex STR,SUBSTR,POSITION
       rindex STR,SUBSTR

 $ perldoc perlfunc | egrep '^ {7}sort '
       sort SUBNAME LIST
       sort BLOCK LIST
       sort LIST

       sort BLOCK LIST
       sort SUBNAME LIST
       sort $SCALAR LIST
       sort \&SUBNAME LIST
       sort LIST

   sort SUBNAME LIST
   sort BLOCK LIST
...

       ...don't include more examples until later...
       (so the examples of just syntax stand out)