Fix nits; capitalization and spaces.

lib/column.js

@@ -3,7 +3,7 @@
 var _ = require('lodash');
 var ColumnNode = require(__dirname + '/node/column');
 var ParameterNode = require(__dirname + '/node/parameter');
-var valueExpressionMixin = require(__dirname + '/node/binary').valueExpressionMixin;
+var ValueExpressionMixin = require(__dirname + '/node/binary').ValueExpressionMixin;
 var OrderByColumnNode = require(__dirname + '/node/orderByColumn');
 var UnaryNode = require(__dirname + '/node/unary');
 var TextNode = require(__dirname + '/node/text');
@@ -104,7 +104,7 @@ Column.prototype.toQuery = function() {
   return this.toNode().toQuery();
 };
 
-Column.prototype = _.extend(Column.prototype, valueExpressionMixin);
+Column.prototype = _.extend(Column.prototype, ValueExpressionMixin);
 
 unaryMethod('isNull', 'IS NULL');
 unaryMethod('isNotNull', 'IS NOT NULL');

lib/node/binary.js

@@ -20,12 +20,12 @@ var binaryMethod = function(operator) {
     }
     return node;
   };
-} ;
+};
 
 // Value expressions can be composed to form new binary expressions.
 // valueExpressionMixin is in this file because it depends upon
 // BinaryNode, while BinaryNode depends upon valueExpressionMixin.
-var valueExpressionMixin = {
+var ValueExpressionMixin = {
   or       : binaryMethod('OR'),
   and      : binaryMethod('AND'),
   equals   : binaryMethod('='),
@@ -59,5 +59,5 @@ var BinaryNode = Node.define(_.extend({
 
 module.exports = {
   BinaryNode : BinaryNode,
-  valueExpressionMixin: valueExpressionMixin
+  ValueExpressionMixin: ValueExpressionMixin
 }