[pstricks] Poorly shaped bracket, two zeros at origin

[Vince McGarry]

Some of this may have discussed and I may have missed it.

With the following code I get two zeros printed as origin labels, slightly
offset, and both brackets are too large (from setting the linewidth),
although the arrow sizes are appropriate, and the second bracket, at (6,0),
is poorly formed.

\begin{pspicture}(-9.5,0)(9.5,0)
\psaxes [labelsep=4pt,yAxis=false,Dx=5,subticks=5]{<->}(0,0)(-9.5,0)(9.5,0)
\psline[linewidth=1.8pt,arrows=[->](0,0)(-8.4,0)
\psline[linewidth=1.8pt,arrows=[->](6,0)(8.4,0)
\end{pspicture}

Vince McGarry