Bug Fixes

• Fix spelling error in main.rs (91ee27f2)
• typo in default out text (644c49f1)
• collections: Naming exercises for vectors and hashmap (bef39b12)
• from_str:
  • Correct typos (5f7c89f8)
  • test for error instead of unwrap/should_panic (15e71535)
  • use trait objects for from_str (c3e7b831)
• functions3: improve function argument type (#687) (a6509cc4)
• hashmap2: Update incorrect assertion (#660) (72aaa15e)
• info: Fix typo (#635) (cddc1e86)
• iterators2: Moved errors out of tests. (baf4ba17, closes #359)
• iterators3: Enabled iterators3.rs to run without commented out tests. (c6712dfc)
• main: Let find_exercise work with borrows (347f30bd)
• move_semantics4:
  • Remove redundant "instead" (#640) (cc266d7d)
  • Small readbility improvement (#617) (10965920)
• option2: Rename uninformative variables (#675) (b4de6594)
• quiz3: Force an answer to Q2 (#672) (0d894e6f)
• structs: Add 5.3 to structs/README (#652) (6bd791f2)
• structs2: correct grammar in hint (#663) (ebdb66c7)
• structs3:
  • reword heading comment (#664) (9f3e8c2d)
  • add check to prevent naive implementation of is_international (05a753fe)
• threads1: line number correction (7857b0a6)
• try_from_into: use trait objects (2e93a588)

Features

• Replace clap with argh (7928122f)
• Replace emojis when NO_EMOJI env variable present (8d62a996)
• Added iterators5.rs exercise. (b29ea17e)
• arc1: Add more details to description and hint (#710) (81be4044)
• cli: Improve the list command with options, and then some (8bbe4ff1)
• list:
  • updated progress percentage (1c6f7e4b)
  • added progress info (c0e3daac)