Update top-level-api.md (#1658)

docs/top-level-api.md

     style: { // ( iOS only )
       drawerShadow: true, // optional, add this if you want a side menu drawer shadow
       contentOverlayColor: 'rgba(0,0,0,0.25)', // optional, add this if you want a overlay color when drawer is open
-      leftDrawerWidth: 50 // optional, add this if you want a define left drawer width (50=percent)
+      leftDrawerWidth: 50, // optional, add this if you want a define left drawer width (50=percent)
       rightDrawerWidth: 50 // optional, add this if you want a define right drawer width (50=percent)
     },
     type: 'MMDrawer', // optional, iOS only, types: 'TheSideBar', 'MMDrawer' default: 'MMDrawer'
     style: { // ( iOS only )
       drawerShadow: true, // optional, add this if you want a side menu drawer shadow
       contentOverlayColor: 'rgba(0,0,0,0.25)', // optional, add this if you want a overlay color when drawer is open
-      leftDrawerWidth: 50 // optional, add this if you want a define left drawer width (50=percent)
+      leftDrawerWidth: 50, // optional, add this if you want a define left drawer width (50=percent)
       rightDrawerWidth: 50 // optional, add this if you want a define right drawer width (50=percent)
     },
     type: 'MMDrawer', // optional, iOS only, types: 'TheSideBar', 'MMDrawer' default: 'MMDrawer'