Doc - Escape doxygen wrongly detected command \file

Author: Liryna

dokan/dokan.h

@@ -109,7 +109,7 @@ extern "C" {
 /**
  * Enable Case sensitive path.
  * By default all path are case insensitive.
- * For case sensitive: \dir\File & \diR\file are different files
+ * For case sensitive: \dir\File & \diR\\file are different files
  * but for case insensitive they are the same.
  */
 #define DOKAN_OPTION_CASE_SENSITIVE (1 << 9)