replace user-id in timelines options w/ deleted user id
add a spec.
Uses new RSpec syntax
Uses will_change! to signal options modification
Merge pull request #898 from opf/feature/user_deletion_remove_user_from_ti_options_2366
fixed a small typo
Revert "fixed a small typo"

This reverts commit 5b96305cb393f9edba620c52ee0d340c3a7403a1.
remove branches from .travis.yml

It is too hard to run travis on forked repositories.
It disturbs pull request process.
Gemfile: remove :platforms from syck