requireSpaceBetweenArguments: loosen rule restriction

Fixes #1025

Author: mikesherov

lib/rules/require-space-between-arguments.js

@@ -52,8 +52,7 @@ module.exports.prototype = {
                 if (punctuatorToken.value === ',') {
                     errors.assert.whitespaceBetween({
                         token: punctuatorToken,
-                        nextToken: file.getNextToken(punctuatorToken),
-                        spaces: 1
+                        nextToken: file.getNextToken(punctuatorToken)
                     });
                 }
             });

test/rules/require-space-between-arguments.js

@@ -19,11 +19,15 @@ describe('rules/require-space-between-arguments', function() {
     });
 
     it('should not report any errors for a(b, c)', function() {
-        assert.strictEqual(checker.checkString('a(b, c);').getErrorCount(), 0);
+        assert(checker.checkString('a(b, c);').isEmpty());
+    });
+
+    it('should not report any errors for a(b,  c)', function() {
+        assert(checker.checkString('a(b,  c);').isEmpty());
     });
 
     it('should not report any errors for a(b)', function() {
-        assert.strictEqual(checker.checkString('a(b);').getErrorCount(), 0);
+        assert(checker.checkString('a(b);').isEmpty());
     });
 
     it('should report for a(foo(),b)', function() {
@@ -35,6 +39,6 @@ describe('rules/require-space-between-arguments', function() {
     });
 
     it('should not report for a(foo(1, 2), b)', function() {
-        assert.strictEqual(checker.checkString('a(foo(1, 2), b);').getErrorCount(), 0);
+        assert(checker.checkString('a(foo(1, 2), b);').isEmpty());
     });
 });