Fixing the function_symbol_spec.rb
Fixing the function_symbol_spec.rb

symengine/symengine.rb,abinashmeher999/symengine.rb,abinashmeher999/symengine.rb,symengine/symengine.rb,abinashmeher999/symengine.rb,rajithv/symengine.rb,rajithv/symengine.rb,rajithv/symengine.rb,symengine/symengine.rb