V10/man/man1/idiff.1

.TH IDIFF 1
.CT 1 files dirs
.SH NAME
idiff \(mi interactive file comparison
.SH SYNOPSIS
.B idiff
[
.I option
]
.I file1 file2
.SH DESCRIPTION
.I Idiff
compares
.I file1
with
.I file2
using
.IR diff ,
then presents each set of changed lines
for selection or processing.
.I File2
may be a directory;
in that case, the basename of
.I file1
is appended.
.PP
For each group, legal responses are
.TP
.B <
to retain the `from' lines
.TP
.B >
to retain the `to' lines
.TP
.B e
to edit both sets of lines
.TP
.B d
to delete both sets
.TP
.B 1
to retain the rest of the `from' file
.TP
.B 2
to retain the rest of the `to' file
.TP
.B !
to invoke a shell command
.PP
Lines that compare equal are copied verbatim from
.I file1.
Lines produced by this process,
including the lines written from within the editor,
are written to file
.IR idiff.out .
Comparison may be affected by the 
.IR diff (1)
options
.TP
.B -b
Ignore trailing blanks (spaces and tabs) and treat other
strings of blanks as if they were a single space. 
.TP
.B -B
Ignore all blanks.
.SH FILES
.TF /tmp/idiff.*
.TP
.F idiff.out
.TP
.F idiff.*
.TP
.F /tmp/idiff.*
.SH SEE ALSO
.IR diff (1)
.SH BUGS
There is no way to revisit a choice.