diff/src/diff3.c

328      This is needed for -mAeExX3.  Using the file0 as
330      file0-file1 diffs didn't line up with the file0-file2 diffs
334      Also, try to compare file0 to file1, because this is where
336      of files is more likely to avoid phantom changes from file0 to file1.
498 	 4) Copy all of the pointers for file0 and 1 in.  Get what is
1494 		       char const *file0, char const *file1, char const *file2)
1553 		   type == DIFF_ALL ? file0 : file1);
1597    DIFF as a merged file.  This acts like 'ed file0
1610 		    char const *file0, char const *file1, char const *file2)
1664 	      fprintf (outputfile, "<<<<<<< %s\n", file0);