Update WordDelimiterTokenFilter.cs

This one is fixing #1563.
By the way checking how PR from browser works in github :)

Author: robertlyson

Diff for: src/Nest/Domain/Analysis/TokenFilter/WordDelimiterTokenFilter.cs

@@ -45,7 +45,7 @@ public WordDelimiterTokenFilter()
         [JsonProperty("protected_words")]
         public IList<string> ProtectedWords { get; set; }
 
-        [JsonProperty("protected_words_path ")]
+        [JsonProperty("protected_words_path")]
         public string ProtectedWordsPath { get; set; }
 
         [Obsolete("Please switch to TypeTableList property", true)]
@@ -57,4 +57,4 @@ public WordDelimiterTokenFilter()
         [JsonProperty("type_table_path")]
         public string TypeTablePath { get; set; }
     }
-}
+}