[Yum] RFE: flush line output in interactive mode

[Gary Funck]

I ran the following command from the command line:

yum -d1 update 2>&1 | tee /tmp/yum.log

and it stops printing at a partial line:

 tetex-xdvi              i386       3.0-20.FC5       updates           866 k
 texinfo                 i386       4.8-9.2.fc5.1    updates           780 k
 tk                      i386       8.4.13-1.1       updates           886 k
 totem                   i386       1.4.1-1          updates           1.7 M
 tzdata                  noarch   

The update is still running, and I'm fairly certain that it
will eventually complete successfully.  However, at the moment
the only output on the screen is partial.  Would be good if
this command flushed logging/diagnostic output at the end of
line.