CHANGES:

#### New features

  + Add an option `--margin-check` to emit a warning if the formatted output exceeds the margin (ocaml-ppx/ocamlformat#1110) (Guillaume Petiot)
  + Preserve comment indentation when `wrap-comments` is unset (ocaml-ppx/ocamlformat#1138, ocaml-ppx/ocamlformat#1159) (Jules Aguillon)
  + Improve error messages (ocaml-ppx/ocamlformat#1147) (Jules Aguillon)
  + Display standard output in the emacs plugin even when ocamlformat does not fail (ocaml-ppx/ocamlformat#1189) (Guillaume Petiot)

#### Removed

  + Remove `ocamlformat_reason` (ocaml-ppx/ocamlformat#254, ocaml-ppx/ocamlformat#1185) (Etienne Millon).
    This tool has never been released to opam, has no known users, and overlaps
    with what `refmt` can do.
  + Remove `ocamlformat-diff` (ocaml-ppx/ocamlformat#1205) (Guillaume Petiot)
    This tool has never been released to opam, has no known users, and overlaps
    with what `merge-fmt` can do.

#### Packaging

  + Work with base v0.13.0 (ocaml-ppx/ocamlformat#1163) (Jules Aguillon)

#### Bug fixes

  + Fix placement of comments just before a '|' (ocaml-ppx/ocamlformat#1203) (Jules Aguillon)
  + Fix build version detection when building in the absence of a git root (ocaml-ppx/ocamlformat#1198) (Anil Madhavapeddy)
  + Fix wrapping of or-patterns in presence of comments with `break-cases=fit` (ocaml-ppx/ocamlformat#1167) (Jules Aguillon)
    This also fixes an unstable comment bug in or-patterns
  + Fix an unstable comment bug in variant declarations (ocaml-ppx/ocamlformat#1108) (Jules Aguillon)
  + Fix: break multiline comments (ocaml-ppx/ocamlformat#1122) (Guillaume Petiot)
  + Fix: types on named arguments were wrapped incorrectly when preceding comments (ocaml-ppx/ocamlformat#1124) (Guillaume Petiot)
  + Fix the indentation produced by max-indent (ocaml-ppx/ocamlformat#1118) (Guillaume Petiot)
  + Fix break after Psig_include depending on presence of docstring (ocaml-ppx/ocamlformat#1125) (Guillaume Petiot)
  + Remove some calls to if_newline and break_unless_newline and fix break before closing brackets (ocaml-ppx/ocamlformat#1168) (Guillaume Petiot)
  + Fix unstable cmt in or-pattern (ocaml-ppx/ocamlformat#1173) (Guillaume Petiot)
  + Fix location of comment attached to the underscore of an open record (ocaml-ppx/ocamlformat#1208) (Guillaume Petiot)
  + Fix parentheses around optional module parameter (ocaml-ppx/ocamlformat#1212) (Christian Barcenas)
  + Fix grouping of horizontally aligned comments (ocaml-ppx/ocamlformat#1209) (Guillaume Petiot)
  + Fix dropped comments around module pack expressions (ocaml-ppx/ocamlformat#1214) (Jules Aguillon)
  + Fix regression of comment position in list patterns (ocaml-ppx/ocamlformat#1141) (Josh Berdine)
  + Fix: adjust definition of Location.is_single_line to reflect margin (ocaml-ppx/ocamlformat#1102) (Josh Berdine)

#### Documentation

  + Fix documentation of option `version-check` (ocaml-ppx/ocamlformat#1135) (Wilfred Hughes)
  + Fix hint when using `break-separators=after-and-docked` (ocaml-ppx/ocamlformat#1130) (Greta Yorsh)