list: note that `ls` command is used.

And arguments can be passed through to it.

Tweak produced out of conversation in
https://github.com/Homebrew/brew-evolution/pull/8.

Library/Homebrew/cmd/list.rb

 #:  * `list`, `ls` [`--full-name`]:
 #:    List all installed formulae. If `--full-name` is passed, print formulae with
-#:    full-qualified names.
+#:    fully-qualified names.
+#:    If `--full-name` is not passed any other options (e.g. `-t`) are passed to
+#:    `ls` which produces the actual output.
 #:
 #:  * `list`, `ls` `--unbrewed`:
 #:    List all files in the Homebrew prefix not installed by Homebrew.

share/doc/homebrew/brew.1.html

@@ -264,7 +264,9 @@ into <code>/Applications</code>, allowing for easier access.</p>
 <p>If provided, <code>--local</code> will symlink them into the user's <code>~/Applications</code>
 directory instead of the system directory.</p></dd>
 <dt><code>list</code>, <code>ls</code> [<code>--full-name</code>]</dt><dd><p>List all installed formulae. If <code>--full-name</code> is passed, print formulae with
-full-qualified names.</p></dd>
+fully-qualified names.
+If <code>--full-name</code> is not passed any other options (e.g. <code>-t</code>) are passed to
+<code>ls</code> which produces the actual output.</p></dd>
 <dt><code>list</code>, <code>ls</code> <code>--unbrewed</code></dt><dd><p>List all files in the Homebrew prefix not installed by Homebrew.</p></dd>
 <dt><code>list</code>, <code>ls</code> [<code>--versions</code> [<code>--multiple</code>]] [<code>--pinned</code>] [<var>formulae</var>]</dt><dd><p>List the installed files for <var>formulae</var>. Combined with <code>--verbose</code>, recursively
 list the contents of all subdirectories in each <var>formula</var>'s keg.</p>

share/man/man1/brew.1

@@ -344,7 +344,7 @@ If provided, \fB\-\-local\fR will symlink them into the user\'s \fB~/Application
 .
 .TP
 \fBlist\fR, \fBls\fR [\fB\-\-full\-name\fR]
-List all installed formulae\. If \fB\-\-full\-name\fR is passed, print formulae with full\-qualified names\.
+List all installed formulae\. If \fB\-\-full\-name\fR is passed, print formulae with fully\-qualified names\. If \fB\-\-full\-name\fR is not passed any other options (e\.g\. \fB\-t\fR) are passed to \fBls\fR which produces the actual output\.
 .
 .TP
 \fBlist\fR, \fBls\fR \fB\-\-unbrewed\fR