fix linear_elastic_probes.py example
fix linear_elastic_probes.py example

RexFuzzle/sfepy,sfepy/sfepy,lokik/sfepy,vlukes/sfepy,sfepy/sfepy,rc/sfepy,lokik/sfepy,rc/sfepy,sfepy/sfepy,BubuLK/sfepy,BubuLK/sfepy,RexFuzzle/sfepy,RexFuzzle/sfepy,vlukes/sfepy,vlukes/sfepy,BubuLK/sfepy,lokik/sfepy,rc/sfepy,RexFuzzle/sfepy,lokik/sfepy