Removed space before -- for consistency with code style.

src/Layout.js

@@ -520,7 +520,7 @@ var computeLayout = (function() {
             // If there's only one element, then it's bigger than the content
             // and needs its own line
             i !== startLine) {
-          nonFlexibleChildrenCount --;
+          nonFlexibleChildrenCount--;
           alreadyComputedNextLayout = 1;
           break;
         }