Changes

<table width="60%"><tr><td><span style="font-family:courier;font-weight:bold;><Upup></span> or <span style="font-family:courier;font-weight:bold;><Downdown></span> </td><td>move to previous command or next command</td></tr><tr><td><span style="font-family:courier;font-weight:bold;>fc -l</span></td><td> display last 16 commands</td></tr><tr><td><span style="font-family:courier;font-weight:bold;>history</span></td><td>display all stored commands</td></tr><tr><td><span style="font-family:courier;font-weight:bold;>!num</span></td><td>re-execute command number "num"</td></tr><tr><td><span style="font-family:courier;font-weight:bold;>!xxx</span></td><td>re-execute last command beginning with string "xxx"</td></tr></table>