Move references to the end of docstring
move helper functions to module level
export egypt_fraction
Rename function: egypt_fraction -> egyptian_fraction
Remove redundant tests
pep8 fixes
simplify random test for egyptian_fraction
Add test helper to test correctness of egyptian_fraction expansion
add egyptian_fraction to sphinx docs
rewrite docstring
fix error string
Merge pull request #1 from skirpichev/coder46-fixes

fixes for pr#2663