Fix lint error

Author: filipesantiagoAM

src/plots/cartesian/position_defaults.js

@@ -84,7 +84,7 @@ module.exports = function handlePositionDefaults(containerIn, containerOut, coer
         if(domain[0] > domain[1] - 1 / 4096) containerOut.domain = dfltDomain;
         Lib.noneOrAll(containerIn.domain, containerOut.domain, dfltDomain);
 
-        // tickmode sync needs an overlaying axis, otherwise 
+        // tickmode sync needs an overlaying axis, otherwise
         // we should default it to 'auto'
         if(containerOut.tickmode === 'sync') {
             containerOut.tickmode = 'auto';