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Node:Detailed Context, Next:, Up:Context Format
Detailed Description of Context Format

The context output format starts with a two-line header, which looks like this:

*** from-file from-file-modification-time
--- to-file to-file-modification time

The time stamp normally looks like 2002-02-21 23:30:39.942229878 -0800 to indicate the date, time with fractional seconds, and time zone in Internet RFC 2822 format. However, a traditional time stamp like Thu Feb 21 23:30:39 2002 is used if the LC_TIME locale category is either C or POSIX.

You can change the header's content with the --label=label option; see Alternate Names.

Next come one or more hunks of differences; each hunk shows one area where the files differ. Context format hunks look like this:

*** from-file-line-range ****
--- to-file-line-range ----

The lines of context around the lines that differ start with two space characters. The lines that differ between the two files start with one of the following indicator characters, followed by a space character:

A line that is part of a group of one or more lines that changed between the two files. There is a corresponding group of lines marked with ! in the part of this hunk for the other file.
An "inserted" line in the second file that corresponds to nothing in the first file.
A "deleted" line in the first file that corresponds to nothing in the second file.

If all of the changes in a hunk are insertions, the lines of from-file are omitted. If all of the changes are deletions, the lines of to-file are omitted.

  Published under the terms of the GNU General Public License Design by Interspire