title: `^&` and `$T` in doskey behave similar but not same
body: <p>I want to open a file in <code>cmd</code> and edit it in Sublime Text's specific group, so I create a doskey like this</p>
  
  <pre><code>rem version 1, ^&amp;
  doskey st="path_to\Sublime Text 3\sublime_text" --command "focus_group { \"group\": $1 }" ^&amp; "path_to\Sublime Text 3\sublime_text" $2
  rem version 2, $T
  doskey st="path_to\Sublime Text 3\sublime_text" --command "focus_group { \"group\": $1 }" $T "path_to\Sublime Text 3\sublime_text" $2
  </code></pre>
  
  <p>The command before <code>^&amp;</code> or <code>$T</code> will focus ST on group <code>$1</code> you want, command after <code>^&amp;</code> or <code>$T</code> will open the file <code>$2</code></p>
  
  <p>Then in <code>cmd</code></p>
  
  <pre><code>&gt;&gt;&gt; rem version 1, ^&amp;
  &gt;&gt;&gt; st 0 test.py &amp; rem press enter
  &gt;&gt;&gt;
  ----------------------------------
  &gt;&gt;&gt; rem version 2, $T
  &gt;&gt;&gt; st 0 test.py &amp; rem press enter, one more prompt compare version 1
  &gt;&gt;&gt;
  &gt;&gt;&gt;
  </code></pre>
  
  <p>Another try</p>
  
  <pre><code>rem alias.bat in C:\Windows\System32, work like alias in linux
  doskey lscd1=dir ^&amp; cd ..
  doskey lscd2=dir $T cd ..
  </code></pre>
  
  <p>Result</p>
  
  <pre><code>path1\path2&gt; lscd1
  Volume in drive C is OS
   Volume Serial Number is DA7D-663C
  
   Directory of path2
  
  11/24/2019  09:45 PM   0 test.py
  path1&gt;
  ---------------------------------
  path1\path2&gt; lscd2
  Volume in drive C is OS
   Volume Serial Number is DA7D-663C
  
   Directory of path2
  
  11/24/2019  09:45 PM   0 test.py
  path1\path2&gt;
  path1&gt;
  </code></pre>
  
  <p>The <a href="https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/doskey" rel="nofollow noreferrer">Doc</a> of <code>$T</code> is </p>
  
  <blockquote>
    <p>$T or $t  Separates commands. Use either of these special characters to separate commands when you create macros or type commands on the doskey command line. These special characters are equivalent to using the ampersand (&amp;) on a command line.</p>
  </blockquote>
  
  <p>I guess <code>^&amp;</code> is '<a href="https://superuser.com/a/1349294/960236">escape the ampersand</a>', why these two behave differently?</p>