Rakefile in mathml2asciimath-0.0.10 vs Rakefile in mathml2asciimath-0.0.11

@@ -1,6 +1,6 @@
 require "bundler/gem_tasks"
 require "rspec/core/rake_task"
 
 RSpec::Core::RakeTask.new(:spec)
 
-task :default => :spec
+task default: :spec