Update roster.txt

updated #15
First Commit
First Commit
Update questions.txt

updated per homework assignment
Update strings_and_rspec_spec.rb
Update strings_and_rspec_spec.rb
Update strings_and_rspec_spec.rb
Update strings_and_rspec_spec.rb
changes for rspec strings
Update strings_and_rspec_spec.rb
updates to homework
all files updated
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