fix version check

index.js

@@ -5,13 +5,13 @@ bitcore.version = 'v'+require('./package.json').version;
 
 var inBrowser = typeof process === 'undefined' || typeof process.versions === 'undefined';
 if ((inBrowser && window._bitcore) || (!inBrowser && global._bitcore)) {
-  var versions = bitcore.version + ' and ' + inBrowser ? window._bitcore : global._bitcore;
+  var versions = bitcore.version + ' and ' + (inBrowser ? window._bitcore : global._bitcore);
   var message = 'More than one instance of bitcore found with different versions: ' + versions;
   if (inBrowser) {
     message += '. Make sure any scripts included don\'t contain their own bitcore bundle.';
   } else {
-    message += '. Make sure there are no version conflicts between package.json files of your '
+    message += '. Make sure there are no version conflicts between package.json files of your ' +
-            + 'dependencies. This could also happen when a package depends on a git repository.';
+      'dependencies. This could also happen when a package depends on a git repository.';
   }
 
   throw new Error(message);