Bug Fixes

• add line numbers in several exercises and hints (b565c4d3)
• arc1: Fix some words in the comment (c42c3b21)
• enums: Add link to chapter on pattern syntax (#242) (615ce327)
• primitive_types4:
  • update outdated hint (4c5189df)
  • update outdated comment (ded2c034)
• strings2: update line number in hint (a09f684f)
• variables1: Correct wrong word in comment (fda5a470)

Features

• watch: show hint while watching (8143d57b)