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Annotation of 42BSD/usr.lib/learn/editor/L30.1a, revision 1.1.1.1

1.1       root        1: #print
                      2: Although it is always possible to fix errors by retyping
                      3: the entire erroneous line with the 'c' command, it is
                      4: usually much faster to make small changes within
                      5: a line.  The editor allows this with the 's' (substitute)
                      6: command.  For example,
                      7:    s/abc/def/
                      8: will change a line previously reading
                      9:    xxx abc
                     10: into one reading
                     11:    xxx def
                     12: by replacing the string 'abc' in the line with the string 'def'.
                     13: In this directory is a file 'pres' with one line that says
                     14: 'harry' where it should say 'george'.  Fix it using the
                     15: substitute command to change 'harry' into 'george'.  You
                     16: should use the 'p' command to print the line before and
                     17: after, checking that you did it correctly.  Then
                     18: rewrite the file and type 'ready'.
                     19: #create Ref
                     20: george washington
                     21: #create pres
                     22: harry washington
                     23: #user
                     24: #cmp Ref pres
                     25: #log
                     26: #next
                     27: 30.1b 10

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