= u/_ command
        .lowercase<-->uppercase translation after the cursor position.
         csr may be on any line.
        .n is not supported for xx-xx pattern

      (1) x[n][,b][.s] pattern

        .translate 4 lines

            u4     |aaaaaaaaaaaaaaa
            0002000|bbbbbbbbbbbbbbb
            0003000|ccccccccccccccc
            0004000|ddddddddddddddd
            0005000|eeeeeeeeeeeeeee

        ===>
         r1 0001000*AAAAAAAAAAAAAAA
         r2 0002000*BBBBBBBBBBBBBBB
         r3 0003000*CCCCCCCCCCCCCCC
         r4 0004000*DDDDDDDDDDDDDDD
            0005000|eeeeeeeeeeeeeee

        .repeat 3 times to translate 2 lines and to skip 1 line.

            u3,2.1 |aaaaaaaaaaaaaaa
            0002000|bbbbbbbbbbbbbbb
            0003000|ccccccccccccccc
            0004000|ddddddddddddddd
            0005000|eeeeeeeeeeeeeee
            0006000|fffffffffffffff
            0007000|ggggggggggggggg
            0008000|hhhhhhhhhhhhhhh
            0009000|iiiiiiiiiiiiiii
            0010000|jjjjjjjjjjjjjjj
        ===>
      r1 b1 0001000*AAAAAAAAAAAAAAA
         b2 0002000*BBBBBBBBBBBBBBB
         s1 0003000|ccccccccccccccc
      r2 b1 0004000*DDDDDDDDDDDDDDD
         b2 0005000*EEEEEEEEEEEEEEE
         s1 0006000|fffffffffffffff
      r3 b1 0007000*GGGGGGGGGGGGGGG
         b2 0008000*HHHHHHHHHHHHHHH
            0009000|iiiiiiiiiiiiiii
            0010000|jjjjjjjjjjjjjjj

      (2) xx-xx[,b][.s] pattern

        .translate all the line of the range.
         cursor in at col 9 in the case.

            uu     |aaaaaaaaaaaaaaa
            0002000|bbbbbbbbbbbbbbb
            0003000|ccccccccccccccc
            0004000|ddddddddddddddd
            uu     |eeeeeeeeeeeeeee
            0006000|fffffffffffffff
        ===>
            0001000*aaaaaaaaAAAAAAA
            0002000*bbbbbbbbBBBBBBB
            0003000*ccccccccCCCCCCC
            0004000*ddddddddDDDDDDD
            0005000*eeeeeeeeEEEEEEE
            0006000|fffffffffffffff


        .repeat in the range to translate 3 lines and to skip 2 lines.
         cursor in at col 9 in the case.

            uu,3.2 |aaaaaaaaaaaaaaa
            0002000|bbbbbbbbbbbbbbb
            0003000|ccccccccccccccc
            0004000|ddddddddddddddd
            0005000|eeeeeeeeeeeeeee
            0006000|fffffffffffffff
            0007000|ggggggggggggggg
            0008000|hhhhhhhhhhhhhhh
            0009000|iiiiiiiiiiiiiii
            uu     |jjjjjjjjjjjjjjj
        ===>
      rr b1 0001000*aaaaaaaaaAAAAAA
         b2 0002000*bbbbbbbbbBBBBBB
         b3 0003000*cccccccccCCCCCC
         s1 0004000|ddddddddddddddd
         s2 0005000|eeeeeeeeeeeeeee
      rr b1 0006000*fffffffffFFFFFF
         b2 0007000*gggggggggGGGGGG
         b3 0008000*hhhhhhhhhHHHHHH
         s1 0009000|iiiiiiiiiiiiiii
         s2 0010000|jjjjjjjjjjjjjjj