Add longer tooltip example to docs, tighten up line-height on tooltip; run make

less/tooltip.less

@@ -11,6 +11,7 @@
   visibility: visible;
   padding: 5px;
   font-size: 11px;
+  line-height: 1.4;
   .opacity(0);
   &.in     { .opacity(80); }
   &.top    { margin-top:  -3px; }
@@ -22,7 +23,7 @@
 // Wrapper for the tooltip content
 .tooltip-inner {
   max-width: 200px;
-  padding: 3px 8px;
+  padding: 8px;
   color: @tooltipColor;
   text-align: center;
   text-decoration: none;