Description of problem:
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Seems that rpl -w option don't takes into account punctuation signs as word boundaries

Version-Release number of selected component (if applicable):
-------------------------------------------------------------
rpl-1.5.5-2.fc11

How reproducible:
-----------------
allways

Steps to Reproduce:
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#!/bin/bash
#creating data file
echo ".rande" > test2.txt
#running replace (with -w option)
rpl -w "rande" "grande" test2.txt
#word not changed (grep returns 0 lines)
grep grande test2.txt;
#grep catch correctly word boundaries
grep -w rande test2.txt;
  
Actual results:
---------------
change not made
'.rande' -> rpl -w "rande" "grande" -> '.rande'

Expected results:
-----------------
'rande' replaced by 'grande'
'.rande' -> rpl -w "rande" "grande" -> '.grande'

Additional info:
----------------
none