DECLARE @topsql nvarchar(200)

SET @topsql =
      'DECLARE @quotedvar nvarchar(100) ' + char(13) +
      'DECLARE @sql nvarchar(1000) ' + char(13) +
      'SET @quotedvar = ''O''''Neil'' ' + char(13) +
	  'SET @sql = ''PRINT '''''' + REPLACE(@quotedvar,'''''''','''''''''''') + '''''''' ' + char(13) +	
      'PRINT @sql ' + char(13) +
      'EXEC sp_executesql @sql '

PRINT @topsql
PRINT '-------'

EXEC sp_executesql @topsql