types+grammar: fixing per review comments in #170
types+grammar: more fixes per #170
types+grammar: tweaks to clarify wording in ch3
types+grammar: tweaking ch4 wording around intentions of the chapter
types+grammar: fixing confusions in ch3, per #170
types+grammar: ch3 adding warning about modifying 'Array.prototype' accidentally
types+grammar: ch3, tweaking/clarifying wording, making 'prototypes as defaults' its own section
types+grammar: ch3 note about 'sparse array' terminology, per @ljharb
types+grammar: minor typo ch4
types+grammar: ch4 adding discussion of truthy/falsy, closes #55
types+grammar: minor wording tweak in ch4
types+grammar: lots more work on explicit vs implicit coercion
types+coercion: ch4, whole bunch of reorg, coverage of ToString, ToNumber, and ToBoolean, as well as strings-numbers coercions, parseInt, etc. closes #74, closes #49
types+grammar: adding section to ch4 'ToString' about related JSON stringifcation, per #162
types+grammar: tweaking wording around JSON.stringify() and how it's not actually coercion but is related
types+grammar: ch4, tweaking wording around abstract operations
types+grammar: ch4, added more info about JSON.stringify(..), closes #162
types+grammar: addressing ch4 editorial comments in #170
types+grammar: tweaking some wording in ch4
types+grammar: ch4, adding discussion of 'Date' coercion, filling out explicit toboolean coercions