fix($location): handle plus character in query strings

Closes #3042

Author: Carlo s A. Guillen

src/Angular.js

@@ -1113,7 +1113,7 @@ function parseKeyValue(/**string*/keyValue) {
   var obj = {}, key_value, key;
   forEach((keyValue || "").split('&'), function(keyValue) {
     if ( keyValue ) {
-      key_value = keyValue.split('=');
+      key_value = keyValue.replace(/\+/g,'%20').split('=');
       key = tryDecodeURIComponent(key_value[0]);
       if ( isDefined(key) ) {
         var val = isDefined(key_value[1]) ? tryDecodeURIComponent(key_value[1]) : true;

test/ng/locationSpec.js

@@ -323,6 +323,18 @@ describe('$location', function() {
         expect(url.search()).toEqual({'i j': '<>#'});
         expect(url.hash()).toBe('x <>#');
       });
+
+      it('should decode pluses as spaces in urls', function() {
+        url = new LocationHtml5Url('http://host.com/');
+        url.$$parse('http://host.com/?a+b=c+d');
+        expect(url.search()).toEqual({'a b':'c d'});
+      });
+
+      it('should retain pluses when setting search queries', function() {
+        url.search({'a+b':'c+d'});
+        expect(url.search()).toEqual({'a+b':'c+d'});
+      });
+
     });
   });