doc/doxygen: do not expand macros in documentation

doc/doxygen/doxygen.cfg

@@ -581,7 +581,7 @@ ENABLED_SECTIONS       =
 # documentation can be controlled using \showinitializer or \hideinitializer
 # command in the documentation regardless of this setting.
 
-MAX_INITIALIZER_LINES  = 30
+MAX_INITIALIZER_LINES  = 0
 
 # Set the SHOW_USED_FILES tag to NO to disable the list of files generated
 # at the bottom of the documentation of classes and structs. If set to YES the