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Annotation of 42BSD/usr.lib/learn/editor/L65.1a, revision 1.1.1.1

1.1       root        1: #print
                      2: A strange, and not often important command, is the 'l' (list) command.
                      3: When it is needed, though, it is vital.  It is almost identical to 'p'
                      4: (print) except that control characters (like tab or backspace) are
                      5: printed in a way that lets you see what they are no matter what the
                      6: terminal does.  From time to time strange characters will sneak into
                      7: your files; they won't show when you print them, and yet they will
                      8: confuse you.  For example, you might be unable to find a line by
                      9: searching for it with
                     10:    /abc/
                     11: and yet it would print as "abc" if there were
                     12: a funny character in the line between 'a' and 'b'.
                     13: Funny characters are generated by hitting the control
                     14: keys on the terminal; they print as '\' followed
                     15: by a number.
                     16: There is a file "weird" in this directory.  Print
                     17: it both with "1,$p" and "1,$l" and observe the difference.
                     18: Then leave the editor.  Which word on the last line has a
                     19: funny character in it? Type "answer WORD" where WORD is
                     20: that word (without the funny symbol).
                     21: #create weird
                     22: This line      has     tabs    in      it.
                     23: So             does            this    one.
                     24: Here is a line ____with backspaces of a useful sort,
                     25: which show how underlining on printed output is done.
                     26: These backspacesonlyconfuse matters.
                     27: 
                     28: there's a strange character in th&is line even though it prints ok.
                     29: #copyin
                     30: #user
                     31: #uncopyin
                     32: #match this
                     33: #log
                     34: #next
                     35: 66.1a 10

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