Simplify function. The shortcut doesn't reliably work because it assumes that neither of the two iterators is past-the-end. If we were to check this in the shortcut, then this would negate the benefits of the shortcut to begin with.
Simplify function. The shortcut doesn't reliably work because it assumes that
neither of the two iterators is past-the-end. If we were to check this in the
shortcut, then this would negate the benefits of the shortcut to begin with.


git-svn-id: 31d9d2f6432a47c86a3640814024c107794ea77c@27975 0785d39b-7218-0410-832d-ea1e28bc413d

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