PR #26876 several iterator trait fixes

several iterator trait fixes #26876

JeffBezanson merged 2 commits into master from jb/iterfixes

ararslan added bugfix

ararslan added traits

fix some traits of Pairs, Rest, and Flatten iterators

26a5610c

fix some definitions of `showarg` for `Pairs`

55d4808a

JeffBezanson force pushed from 7e51ab94 to 55d4808a 8 years ago

JeffBezanson merged 6f507746 into master 8 years ago

mbauman deleted the jb/iterfixes branch 8 years ago

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