<p dir="auto">Please have a look at</p>
<p dir="auto"><a href="https://groups.google.com/forum/?fromgroups=#!topic/twitter-bootstrap/O2J2ht6-qoM" rel="nofollow">https://groups.google.com/forum/?fromgroups=#!topic/twitter-bootstrap/O2J2ht6-qoM</a></p>
<p dir="auto">so there is no duplication.</p>
<p dir="auto">directive block with unrecognised format on line 253 in file 'mixins.less':<br>
[252]:   // Multiple shadow solution from <a href="http://toekneestuck.com/blog/2012/05/15/less-css-arguments-variable/" rel="nofollow">http://toekneestuck.com/blog/2012/05/15/less-css-arguments-variable/</a><br>
[253]:   <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/props/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/props">@props</a>: ~<code class="notranslate">"@{arguments}".replace(/[\[\]]|\,\sX/g, '')</code>;<br>
--^<br>
[254]:   -webkit-box-shadow: <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/props/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/props">@props</a>;<br>
[Done - Failed]</p>
<p dir="auto">Process finished with exit code -5</p>
<p dir="auto">2.1.1</p>