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Annotation of 43BSDTahoe/usr.lib/learn/files/L12.1a, revision 1.1.1.1

1.1       root        1: #print
                      2: Another very useful command is the command
                      3:  diff x y
                      4: which compares two files.  It will not print
                      5: any output if the two files are the same, but
                      6: if the files are different it will print
                      7: out the lines that are changed in the two files,
                      8: indicating the lines from the first file (x) by a leading "<"
                      9: and the lines from the second file (y) by a leading ">".
                     10: There are two files in this directory named "old" and "new".
                     11: Why don't you first print both files, and then
                     12: try using "diff" to compare them?  Suppose the files
                     13: were hundreds of lines long, and you needed to know
                     14: the single difference - do you see how valuable "diff" can be?
                     15: As evidence that you did at least half of this,
                     16: type "answer word" where "word" is the word added to the
                     17: second file.
                     18: #create new
                     19: Four score and seven
                     20: years ago our fathers
                     21: brought forth on this
                     22: continent a new nation,
                     23: conceived in liberty
                     24: and dedicated to the 
                     25: proposition that all
                     26: men are created equal.
                     27: #create old
                     28: Four score and seven
                     29: years ago our fathers
                     30: brought forth on this
                     31: continent a new nation,
                     32: conceived in liberty
                     33: and dedicated the 
                     34: proposition that all
                     35: men are created equal.
                     36: #copyin
                     37: #user
                     38: #uncopyin
                     39: #match to
                     40: #log
                     41: #next
                     42: 13.01a

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