Fixing typos

[SemicolonExpected]

As MOOC is a "Massive Open Online Course" MOOC course is redundant

Elaborated on "real problem" to "real world problem" to avoid confusion

Fixed a few small grammatical and wording errors

[ericdouglas]

@SemicolonExpected thank you for your help! 🙏

Could you also make more two things?

• Bump our Curriculum Version to 1.1.1 here, because you're fixing a bug in our file.

• Add a little explanation in our CHANGELOG file, saying what you're doing. More explanation about CHANGELOG files here. The text will be something like this:

  [1.1.1] 2015-10-11
  
  ### Fixed
  - Fix typos
    - As MOOC is a "Massive Open Online Course" MOOC course is redundant
    - Elaborated on "real problem"
    - Fixed a few small grammatical and wording errors
  

[SemicolonExpected]

@ericdouglas I have done just that, and added the change to the change log

[ericdouglas]

@SemicolonExpected awesome! Thank you so much! 👏