Format: SHOW BUFFER

 The SHOW BUFFER (abbreviated SH BU) command lists the buffers being used
 during the edit session, including the number of lines of text in each
 buffer. The current  buffer is marked by an  equal sign (=) before the
 name.  If an asterisk follows the number of lines, it indicates that an
 input file is connected to the buffer and that there are more lines to
 be read from the file. Thus, the line count is not accurate.