* object.c (Module#attr_reader, Module#attr): Documented String arguments.
* object.c (Module#attr_writer): Documented String arguments.
* object.c (Module#attr_accessor): Documented String arguments.
* object.c (Object#instance_variable_get): Documented String arguments.
* object.c (Object#instance_variable_set): Documented String arguments.
* object.c (Object#instance_variable_defined?): Documented String arguments.
* object.c (Module#class_variable_get): Documented String arguments.
* object.c (Module#class_variable_set): Documented String arguments.
* object.c (Module#class_variable_defined?): Documented String arguments.
* vm_eval.c (Object#public_send): Documented String arguments.
* vm_method.c (Module#remove_method): Documented String arguments.
* vm_method.c (Module#undef_method): Documented String arguments.
* vm_method.c (Module#method_defined?): Documented String arguments.
* vm_method.c (Module#public_method_defined?): Documented String arguments.
* vm_method.c (Module#private_method_defined?): Documented String arguments.
* vm_method.c (Module#protected_method_defined?): Documented String arguments.
* vm_method.c (Module#public): Documented String arguments.
* vm_method.c (Module#protected): Documented String arguments.
* vm_method.c (Module#private): Documented String arguments.
* vm_method.c (Module#public_class_method): Documented String arguments.