make wider for long var names

Author: peilingjiang

client/styles/components/_hints.scss

@@ -13,7 +13,7 @@
   font-size: 100%;
   font-family: Inconsolata, monospace;
 
-  width: 16rem;
+  width: 18rem;
   max-height: 20rem;
   overflow-y: auto;