Compare three files line by line.
-e --ed
Output unmerged changes from OLDFILE to YOURFILE into MYFILE.
-E --show-overlap
Output unmerged changes, bracketing conflicts.
-A --show-all
Output all changes, bracketing conflicts.
-x --overlap-only
Output overlapping changes.
-X
Output overlapping changes, bracketing them.
-3 --easy-only
Output unmerged nonoverlapping changes.
-m --merge
Output merged file instead of ed script (default -A).
-L LABEL --label=LABEL
Use LABEL instead of file name.
-i
Append `w' and `q' commands to ed scripts.
-a --text
Treat all files as text.
-T --initial-tab
Make tabs line up by prepending a tab.
--diff-program=PROGRAM
Use PROGRAM to compare files.
-v --version
Output version info.
If a FILE is `-', read standard input.