update changes

ocaml · Aug 5, 2020 · b2eca78 · b2eca78
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commit b2eca78
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diff --git a/master_changes.md b/master_changes.md
@@ -5,3 +5,4 @@ New option/command/subcommand are prefixed with ◈.
 
 # Opam file format
   * Update opam-format lib to opam-file-format end position and new type definition [#4298 @rjbou]
+  * `with_preserved_format` preserves in fields also, don't drop comments, etc. [#4302 @rjbou - fix #3993]