fix docstring of IntegrateMatTerm
fix docstring of IntegrateMatTerm

sfepy/sfepy,vlukes/sfepy,sfepy/sfepy,BubuLK/sfepy,rc/sfepy,vlukes/sfepy,vlukes/sfepy,BubuLK/sfepy,rc/sfepy,rc/sfepy,sfepy/sfepy,BubuLK/sfepy