title: tabularx \linewidth refitting not working
body: <p>I tell <code>tabularx</code> to refit my table to <code>\textwidth</code>, but it doesn't work (<code>\linewidth</code> doesn't work either). It would be ok if the font size gets reduced to achieve the desired result!</p>
  
  <p>Interestingly, the first and last <code>\hline</code> are being resized to <code>\textwidth</code>, but the rest of the table is not (see picture).</p>
  
  <p>Any help highly appreciated. Below find the code to my example:</p>
  
  <pre><code>\begin{table}[h!]
  \centering
  \caption{asdf}
  \begin{tabularx}{\linewidth}{ccllllllll}
  \hline
  &amp;  &amp; \multicolumn{4}{c}{X = Gini} &amp; \multicolumn{4}{c}{X = Selfishness} \\ \cline{3-10}
  Treatment &amp; Round &amp; \multicolumn{2}{c}{WMW} &amp; \multicolumn{2}{c}{Schlag} &amp; \multicolumn{2}{c}{WMW} &amp; \multicolumn{2}{c}{Schlag} \\
  &amp;  &amp; \multicolumn{1}{c}{reduced} &amp; \multicolumn{1}{c}{full} &amp; \multicolumn{1}{c}{reduced} &amp; \multicolumn{1}{c}{full} &amp; \multicolumn{1}{c}{reduced} &amp; \multicolumn{1}{c}{full} &amp; \multicolumn{1}{c}{reduced} &amp; \multicolumn{1}{c}{full} \\ \cline{3-10}
  \multirow{3}{*}{1} &amp; 1 &amp; .123*** &amp; .123*** &amp; .123*** &amp; .123*** &amp; .123*** &amp; .123*** &amp; .123*** &amp; .123*** \\
  &amp; 2 &amp; .123** &amp; .123** &amp; .123** &amp; .123** &amp; .123** &amp; .123** &amp; .123** &amp; .123** \\
   &amp; 3 &amp; .123* &amp; .123* &amp; .123* &amp; .123* &amp; .123* &amp; .123* &amp; .123* &amp; .123* \\
  \multirow{3}{*}{2} &amp; 1 &amp; .123 &amp; .123 &amp; .123 &amp; .123 &amp; .123 &amp; .123 &amp; .123 &amp; .123 \\
   &amp; 2 &amp; .123 &amp; .123 &amp; .123 &amp; .123 &amp; .123 &amp; .123 &amp; .123 &amp; .123 \\
   &amp; 3 &amp; .123 &amp; .123 &amp; .123 &amp; .123 &amp; .123 &amp; .123 &amp; .123 &amp; .123 \\
  \hline
  \end{tabularx}
  \end{table}
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/13f9x.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/13f9x.png" alt="enter image description here"></a></p>