manpage: document '--dry-run' for 'prune' command
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				@ -343,10 +343,13 @@ With `--verbose` or `-v`, many commands print extra debugging information. Note
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    Pin the specified <formulae>, preventing them from being upgraded when
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    issuing the `brew upgrade` command. See also `unpin`.
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  * `prune`:
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  * `prune` [`--dry-run`]:
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    Remove dead symlinks from the Homebrew prefix. This is generally not
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    needed, but can be useful when doing DIY installations.
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    If `--dry-run` or `-n` is passed, show what would be removed, but do not
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    actually remove anything.
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  * `reinstall` <formula>:
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    Uninstall then install <formula>
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@ -271,8 +271,11 @@ precedence over <code>--verbose</code>).</p>
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valid version is <code>v1</code>.</p></dd>
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<dt><code>pin</code> <var>formulae</var></dt><dd><p>Pin the specified <var>formulae</var>, preventing them from being upgraded when
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issuing the <code>brew upgrade</code> command. See also <code>unpin</code>.</p></dd>
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<dt class="flush"><code>prune</code></dt><dd><p>Remove dead symlinks from the Homebrew prefix. This is generally not
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needed, but can be useful when doing DIY installations.</p></dd>
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<dt><code>prune</code> [<code>--dry-run</code>]</dt><dd><p>Remove dead symlinks from the Homebrew prefix. This is generally not
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needed, but can be useful when doing DIY installations.</p>
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<p>If <code>--dry-run</code> or <code>-n</code> is passed, show what would be removed, but do not
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actually remove anything.</p></dd>
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<dt><code>reinstall</code> <var>formula</var></dt><dd><p>Uninstall then install <var>formula</var></p></dd>
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<dt><code>rm</code>, <code>remove</code>, <code>uninstall</code> [<code>--force</code>] <var>formula</var></dt><dd><p>Uninstall <var>formula</var>.</p>
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@ -367,9 +367,12 @@ If \fB\-\-json=\fR\fIversion\fR is passed, the output will be in JSON format\. T
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Pin the specified \fIformulae\fR, preventing them from being upgraded when issuing the \fBbrew upgrade\fR command\. See also \fBunpin\fR\.
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.
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.TP
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\fBprune\fR
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\fBprune\fR [\fB\-\-dry\-run\fR]
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Remove dead symlinks from the Homebrew prefix\. This is generally not needed, but can be useful when doing DIY installations\.
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.
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.IP
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If \fB\-\-dry\-run\fR or \fB\-n\fR is passed, show what would be removed, but do not actually remove anything\.
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.
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.TP
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\fBreinstall\fR \fIformula\fR
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Uninstall then install \fIformula\fR
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