org: comments
14.8.2.9 ‘:comments’
....................
By default code blocks are tangled to source-code files without any
insertion of comments beyond those which may already exist in the body
of the code block. The ‘:comments’ header argument can be set as
follows to control the insertion of extra comments into the tangled code
file.
• ‘no’ The default. No extra comments are inserted during tangling.
• ‘link’ The code block is wrapped in comments which contain pointers
back to the original Org file from which the code was tangled.
• ‘yes’ A synonym for “link” to maintain backwards compatibility.
• ‘org’ Include text from the Org mode file as a comment. The text
is picked from the leading context of the tangled code and is
limited by the nearest headline or source block as the case may be.
• ‘both’ Turns on both the “link” and “org” comment options.
• ‘noweb’ Turns on the “link” comment option, and additionally wraps
expanded noweb references in the code block body in link comments.