Fix lint compliant

Author: zhengbli

src/server/protocol.d.ts

@@ -516,7 +516,7 @@ declare namespace ts.server.protocol {
         /**
          * Used when a version of the file content is known to be more up to date than the one on disk. 
          * Then the known content will be used upon opening instead of the disk copy   
-         */ 
+         */
         fileContent?: string;
     }