Issue #158: Done.

src/module/abbreviateNumber.js

@@ -24,7 +24,7 @@ export default function abbreviateNumber(totalSeconds) {
     if(units[i] > 0) result += units[i] + symbols[i] + " ";
   }
   result.trim();
-  if(totalSeconds === 0) result = '0 s';
+  if(totalSeconds === 0) result = '0';
 
   return result;
 };