|  | This is a terse description of the new features added to readline-6.2 since | 
|  | the release of readline-6.1. | 
|  |  | 
|  | a.  The history library does not try to write the history filename in the | 
|  | current directory if $HOME is unset.  This closes a potential security | 
|  | problem if the application does not specify a history filename. | 
|  |  | 
|  | b.  New bindable variable `completion-display-width' to set the number of | 
|  | columns used when displaying completions. | 
|  |  | 
|  | c.  New bindable variable `completion-case-map' to cause case-insensitive | 
|  | completion to treat `-' and `_' as identical. | 
|  |  | 
|  | d.  There are new bindable vi-mode command names to avoid readline's case- | 
|  | insensitive matching not allowing them to be bound separately. | 
|  |  | 
|  | e.  New bindable variable `menu-complete-display-prefix' causes the menu | 
|  | completion code to display the common prefix of the possible completions | 
|  | before cycling through the list, instead of after. |