[eslint-v2] add one-var-declaration-per-line

packages/eslint-config-airbnb/rules/style.js

@@ -97,6 +97,9 @@ module.exports = {
     'object-curly-spacing': [2, 'always'],
     // allow just one var statement per function
     'one-var': [2, 'never'],
+    // require a newline around variable declaration
+    // http://eslint.org/docs/rules/one-var-declaration-per-line
+    'one-var-declaration-per-line': [2, 'always'],
     // require assignment operator shorthand where possible or prohibit it entirely
     'operator-assignment': 0,
     // enforce operators to be placed before or after line breaks