???<!-- GIF89;a -->
123123123123
.....................................................................................................................................???<!-- GIF89;a -->
123123123123
.....................................................................................................................................--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
full_name: RubyLex#ungetc
is_singleton: false
name: ungetc
params: (c = nil)
visibility: public