condense rendered_html css

IPython/frontend/html/notebook/static/css/style.min.css

@@ -104,10 +104,9 b' pre,code,kbd,samp{white-space:pre-wrap;}'
 .rendered_html hr{color:black;background-color:black;}
 .rendered_html pre{margin:1em 2em;}
 .rendered_html blockquote{margin:1em 2em;}
-.rendered_html table{border:1px solid black;border-collapse:collapse;margin:1em 2em;}
-.rendered_html td{border:1px solid black;text-align:left;vertical-align:middle;padding:4px;}
-.rendered_html th{border:1px solid black;text-align:left;vertical-align:middle;padding:4px;font-weight:bold;}
-.rendered_html tr{border:1px solid black;}
+.rendered_html table,.rendered_html tr,.rendered_html th,.rendered_html td{border:1px solid black;border-collapse:collapse;margin:1em 2em;}
+.rendered_html td,.rendered_html th{text-align:left;vertical-align:middle;padding:4px;}
+.rendered_html th{font-weight:bold;}
 .rendered_html p{text-align:justify;}
 .rendered_html p+p{margin-top:1em;}
 .corner-all{border-radius:3px;}

IPython/frontend/html/notebook/static/less/renderedhtml.less

@@ -1,4 +1,5 b''
 .rendered_html{
+
     color: black;
     em {font-style: italic;}
     strong {font-weight: bold;}
@@ -34,31 +35,22 b''
         margin: 1em 2em;
     }
 
-    table {
+    table, tr, th, td {
         border: 1px solid black;
         border-collapse: collapse;
         margin: 1em 2em;
     }
 
-    td {
-        border: 1px solid black;
+    td,th {
         text-align: left;
         vertical-align: middle;
         padding: 4px;
     }
 
     th {
-        border: 1px solid black;
-        text-align: left;
-        vertical-align: middle;
-        padding: 4px;
         font-weight: bold;
     }
 
-    tr {
-        border: 1px solid black;
-    }
-
     p {
         text-align: justify;
     }