Fix: pending assignments undefined for iterations

The iterations tooltip for the users pending assignments was showing
undefined instead of the actual count. This PR fixes that.
Updates anagram tests so that returned array order doesn't matter. Implements #471
Merge pull request #473 from hersha/anagram_improvement

Updates ruby anagram tests so that returned array order doesn't matter.
Merge pull request #472 from Dparker1990/fix_versions_tooltip

Fix: pending assignments undefined for iterations
Delete `nil` case from ruby:bob

It's bad practice, assume that someone higher up in the system protects
against the nils.
Delete leftover code
Make tooltip for nits show correct count
Tooltip now clarifies that nit count is by others
Add RNA transcription assignment in Rust
fixed python anagram tests
Merge pull request #485 from n1k0/fix-python-anagram-tests

Fixed tests for Python anagram exercise
Merge pull request #481 from cypher/rust-rna-transcription-assignment

Add RNA transcription assignment in Rust
Merge pull request #480 from doncruse/tooltips

Fixing the mouseovers mentioned in #434 (and completing #467)