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The normal output format consists of one or more hunks of differences;
each hunk shows one area where the files differ. Normal format hunks
look like this:
change-command
< from-file-line
< from-file-line...
---
> to-file-line
> to-file-line...
There are three types of change commands. Each consists of a line
number or comma-separated range of lines in the first file, a single
character indicating the kind of change to make, and a line number or
comma-separated range of lines in the second file. All line numbers are
the original line numbers in each file. The types of change commands
are:
- `lar'
-
Add the lines in range r of the second file after line l of
the first file. For example, `8a12,15' means append lines 12--15
of file 2 after line 8 of file 1; or, if changing file 2 into file 1,
delete lines 12--15 of file 2.
- `fct'
-
Replace the lines in range f of the first file with lines in range
t of the second file. This is like a combined add and delete, but
more compact. For example, `5,7c8,10' means change lines 5--7 of
file 1 to read as lines 8--10 of file 2; or, if changing file 2 into
file 1, change lines 8--10 of file 2 to read as lines 5--7 of file 1.
- `rdl'
-
Delete the lines in range r from the first file; line l is where
they would have appeared in the second file had they not been deleted.
For example, `5,7d3' means delete lines 5--7 of file 1; or, if
changing file 2 into file 1, append lines 5--7 of file 1 after line 3 of
file 2.
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