Document new env vars suppressing new cask/formula sections

Homebrew · Aug 7, 2023 · 0f55d4b · 0f55d4b
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diff --git a/docs/Manpage.md b/docs/Manpage.md
@@ -747,6 +747,9 @@ Fetch the newest version of Homebrew and all formulae from GitHub using `git`(1)
 * `-f`, `--force`:
   Always do a slower, full update check (even if unnecessary).
 
+If `HOMEBREW_NO_UPDATE_REPORT_FORMULAE`/`HOMEBREW_NO_UPDATE_REPORT_CASKS` is set, `brew update` will not show the list of newly added formulae/casks, respectively.
+If `HOMEBREW_NO_UPDATE_REPORT_FORMULAE_DELETED`/`HOMEBREW_NO_UPDATE_REPORT_CASKS_DELETED` is set, `brew update` will also not show the list of deleted formulae/casks, respectively.
+
 ### `update-reset` [*`path-to-tap-repository`* ...]
 
 Fetch and reset Homebrew and all tap repositories (or any specified *`repository`*) using `git`(1) to their latest `origin/HEAD`.