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If any line in a web source code contains the command ‘@%’, all remaining material on that line (to and including the newline character) is ignored by the input driver and never processed at all.
A stronger form of this command is ‘@%%’. This deletes the current line as well any empty lines that immediately follow. This command is particularly useful when the N mode is in effect. See ‘@N’: Turn on N mode.
Line-numbering problems can arise when these commands are used. For a discussion, see ‘-T#’: Don’t insert ‘#line’ command after ‘@%’.