Removed comment about assert[ci skip]

- We are not asserting presence of more than one edge anymore
[skip ci] Build instructions are now obsolete
Merge pull request #844 from prathamesh-sonpatki/remove-assert-comment

Removed comment about assert[ci skip]
Fixed a bug in checking the type of edges in EdgeTypeIterator

- While checking for type of edges, equality is not sufficient as we
  are comparing two objects
- Added specs for this change