Description of problem:
The watch command can show the output from a program periodically.
The -d option is intended to highlight changes. In some cases chars
are highlighted eventhough they have not changed.

Version-Release number of selected component (if applicable):
procps-2.0.11-6

How reproducible:
Happens every time.

Steps to Reproduce:
1. watch -d head /proc/sys/kernel/random/*
    
Actual results:
Parts of the first filename is highlighted.

Expected results:
Only the changing file contents should be highlighted.

Additional info:
The problem seems to be related to the length of the
command line.