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Manipulating text with sed

Comments in sed

The # function introduces a comment. Text following a comment is ignored, up to the first newline. If the last character on the comment line is a backslash, the following line is interpreted as a continuation of the comment, up to the first newline:

   # This sed script transforms source files written \
   using the troff mm macro library into troff ms source.
This sequence has exactly the same effect as the following:
   # This sed script transforms source files written
   # using the troff mm macro library into troff ms source.
If the character immediately following the # character is an ``n'', no output will be automatically generated by the script. This construction has the same effect as the -n command line option (see ``Using sed'').
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