diff - Windows command-line utility to give the differences of
two files
SYNOPSIS
diff [-c | -e | -f | -C n] [-b] [-r]file1file2
DESCRIPTION
The diff(1w) utility compares the contents of
file1 and file2 and writes a list of changes
necessary to convert file1 into file2 to the standard
output. No output is produced if the files are identical.
The diff utility supports the following options:
-b
Causes any amount of white space at the end of a line to be
treated as a single newline character (that is, the white-space
characters preceding the newline character are ignored); the other
strings of white-space characters, except newline characters,
compare as equal.
-c
Produces output in a form that provides three lines of
context.
-C
Produces output in a form that provides n lines of
context (where n is interpreted as a positive decimal
integer).
-e
Produces output in a form suitable as input for the ed
utility, which can be used to convert file1 into
file2.
-f
Produces output in an alternative form, similar in format to
the -e option, but unsuitable as input for the
ed utility, and in the opposite order.
-r
Applies diff recursively to files and directories of the
same name when file1 and file2 are both
directories.