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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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