DEV: Apply syntax_tree formatting to spec/*

spec/lib/content_buffer_spec.rb

@@ -1,9 +1,8 @@
 # frozen_string_literal: true
 
-require 'content_buffer'
+require "content_buffer"
 
 RSpec.describe ContentBuffer do
-
   it "handles deletion across lines properly" do
     c = ContentBuffer.new("a\nbc\nc")
     c.apply_transform!(start: { row: 0, col: 0 }, finish: { col: 1, row: 1 }, operation: :delete)
@@ -26,5 +25,4 @@ RSpec.describe ContentBuffer do
     c.apply_transform!(start: { row: 0, col: 5 }, operation: :insert, text: "\nworld")
     expect(c.to_s).to eq("hello\nworld!")
   end
-
 end