char_representation ::= nonquote_char | quote_symbol
This rule is called by -> ada_initial_value -> char_string_lit -> cobol_variable_def -> c_initial_value -> national_char_string_lit -> pl1_variable_def
-> ada_initial_value -> char_string_lit -> cobol_variable_def -> c_initial_value -> national_char_string_lit -> pl1_variable_def