Don't pluralize model names not ending with letters

closes #1703

lib/utils.js

@@ -54,6 +54,7 @@ exports.pluralization = [
   [/([m|l])ouse$/gi, '$1ice'],
   [/(quiz)$/gi, '$1zes'],
   [/s$/gi, 's'],
+  [/([^a-z])$/, '$1'],
   [/$/gi, 's']
 ];
 var rules = exports.pluralization;

test/gh-1703.test.js

@@ -0,0 +1,48 @@
+
+/**
+ * Test dependencies.
+ */
+
+var start = require('./common')
+    , assert = require('assert')
+    , mongoose = start.mongoose
+    , random = require('../lib/utils').random
+    , Query = require('../lib/query')
+    , Schema = mongoose.Schema
+    , SchemaType = mongoose.SchemaType
+    , CastError = mongoose.Error.CastError
+    , ValidatorError = mongoose.Error.ValidatorError
+    , ValidationError = mongoose.Error.ValidationError
+    , ObjectId = Schema.Types.ObjectId
+    , DocumentObjectId = mongoose.Types.ObjectId
+    , DocumentArray = mongoose.Types.DocumentArray
+    , EmbeddedDocument = mongoose.Types.Embedded
+    , MongooseArray = mongoose.Types.Array
+    , MongooseError = mongoose.Error;
+
+describe('(gh-1703) Dont pluralize collection names that dont end with a lowercase letter', function(){
+    it('should not pluralize _temp_', function(done){
+        var db = start();
+
+        var ASchema = new Schema ({
+            value: { type: Schema.Types.Mixed }
+        });
+
+        var collectionName = '_temp_';
+        var A = db.model(collectionName, ASchema);
+        assert.equal(A.collection.name, collectionName);
+        done();
+    });
+    it('should pluralize _temp', function(done){
+        var db = start();
+
+        var ASchema = new Schema ({
+            value: { type: Schema.Types.Mixed }
+        });
+
+        var collectionName = '_temp';
+        var A = db.model(collectionName, ASchema);
+        assert.equal(A.collection.name, collectionName + 's');
+        done();
+    })
+});