Texticle throws a syntax error, following RVM ruby interpreter version update

gistfile1.txt

@ykiw-1.8.7 Eric-Ubuntu:~/Desktop/Dropbox/ykiw3 eric (master) $ rails s
/home/eric/.rvm/gems/ruby-1.8.7-p352@ykiw/gems/bundler-1.0.15/lib/bundler/runtime.rb:68:in `require': /home/eric/.rvm/gems/ruby-1.8.7-p352@ykiw/gems/texticle-2.0/lib/texticle.rb:44: syntax error, unexpected tIDENTIFIER, expecting tAMPER (SyntaxError)
      __send__(method, *search_terms, exclusive)
                                               ^
/home/eric/.rvm/gems/ruby-1.8.7-p352@ykiw/gems/texticle-2.0/lib/texticle.rb:72: undefined (?...) sequence: /^search_by_(?<columns>[_a-zA-Z]\w*)$/
/home/eric/.rvm/gems/ruby-1.8.7-p352@ykiw/gems/texticle-2.0/lib/texticle.rb:80: undefined (?...) sequence: /^search_by_(?<columns>[_a-zA-Z]\w*)$/
	from /home/eric/.rvm/gems/ruby-1.8.7-p352@ykiw/gems/bundler-1.0.15/lib/bundler/runtime.rb:68:in `require'
	from /home/eric/.rvm/gems/ruby-1.8.7-p352@ykiw/gems/bundler-1.0.15/lib/bundler/runtime.rb:66:in `each'
	from /home/eric/.rvm/gems/ruby-1.8.7-p352@ykiw/gems/bundler-1.0.15/lib/bundler/runtime.rb:66:in `require'
	from /home/eric/.rvm/gems/ruby-1.8.7-p352@ykiw/gems/bundler-1.0.15/lib/bundler/runtime.rb:55:in `each'
	from /home/eric/.rvm/gems/ruby-1.8.7-p352@ykiw/gems/bundler-1.0.15/lib/bundler/runtime.rb:55:in `require'
	from /home/eric/.rvm/gems/ruby-1.8.7-p352@ykiw/gems/bundler-1.0.15/lib/bundler.rb:120:in `require'
	from /home/eric/Desktop/Dropbox/ykiw3/config/application.rb:7
	from /home/eric/.rvm/gems/ruby-1.8.7-p352@ykiw/gems/railties-3.0.9/lib/rails/commands.rb:28:in `require'
	from /home/eric/.rvm/gems/ruby-1.8.7-p352@ykiw/gems/railties-3.0.9/lib/rails/commands.rb:28
	from /home/eric/.rvm/gems/ruby-1.8.7-p352@ykiw/gems/railties-3.0.9/lib/rails/commands.rb:27:in `tap'
	from /home/eric/.rvm/gems/ruby-1.8.7-p352@ykiw/gems/railties-3.0.9/lib/rails/commands.rb:27
	from script/rails:6:in `require'
	from script/rails:6