Improve alignment of bindings in emaps-describe-keymap-bindings

[GuiltyDolphin]

At the moment, running emaps-describe-keymap-bindings, doesn't produce great alignment.

Example

Buffer from (emaps-describe-keymap-bindings 'Info-edit-mode-map):

Describing bindings for 'Info-edit-mode-map
key             binding
---             -------

C-c         Prefix Command
ESC         Prefix Command

C-c C-c     Info-cease-edit

<menu-bar> <text>           Prefix Command

C-M-i       ispell-complete-word

<menu-bar> <text> <center-line>
                                center-line
<menu-bar> <text> <center-paragraph>
                                center-paragraph
<menu-bar> <text> <center-region>
                                center-region
<menu-bar> <text> <paragraph-indent-minor-mode>
                                paragraph-indent-minor-mode
<menu-bar> <text> <toggle-text-mode-auto-fill>
                                toggle-text-mode-auto-fill

[back]

I think the main issues are:

• <menu-bar> <text> Prefix Command
  • Doesn't appear to be aligning with anything else
• C-M-i ispell-complete-word
  • Appears after <menu-bar> <text> Prefix Command
    • Though it is aligned with the non-<menu-bar> items, the break in format makes the alignment feel off

I think it is sensible to keep line breaking at 72 characters.