Can we force questions that are tagged matplotlib and pylab to have the python syntax-highlighting? Since matplotlib/pylab is a python-only library I don't see why this would be a problem. I've been adding the python tag as a workaround, but this seems like a useless edit. Example:
Save plot to image file instead of displaying it using Matplotlib
<!-- language: lang-py -->
in front of your code block to get the highlighting to work.