Merge pull request #6 from JulianHentea/54145905_about_strings_master

Learning strings

[Delivers #54145905]
Update about_hashes.rb
Update about_hashes.rb
Merge pull request #9 from JulianHentea/54145909_about_symbols_master

Learned about symbols

[Delivers #54145909]
Merge pull request #10 from JulianHentea/54145915_about_methods_master

Leaned about methods

[Delivers #54145915]
Learned about Hashes

  * I still have to figure out
    test_default_value_is_the_same_object
  * I wish it had more nested hashes

[#54145901]