• The body of a guarded expression must now be indented past the guard. For example, this is valid:

positive n | n > 0 = true
positive _ = false

but this is not:

positive n | n > 0
  = true
positive _ = false

• Type wildcards are now supported (#287, @paf31)

• Allow unquoted keywords as key names in record literals (#606, @michaelficarra)
• Import instances when referencing qualified values (#667, @garyb)
• Multiple guard clauses are now supported (#294, @paf31)
• Type check let declarations immediately in psci (#615, @garyb)