docs: update docstrings in terms_fibres.py for sphinx
docs: update docstrings in terms_fibres.py for sphinx

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