# File ext/psych/lib/psych/syntax_error.rb, line 8definitializefile,line,col,offset,problem,contexterr      = [problem,context].compact.join' 'filename =file||'<unknown>'message  ="(%s): %s at line %d column %d"% [filename,err,line,col]@file    =file@line    =line@column  =col@offset  =offset@problem =problem@context =contextsuper(message)end