docs: improve the legibility of an itemized list

Also, mention my email address in the colophon of the PDF,
to avoid the impression that Chris is the sole responsible.

And improve the general layout by adding three blank lines.

doc/nano.texi

@@ -58,6 +58,9 @@ under the terms of either of the following licenses:
 
 @sp 5
 You may contact the original author by e-mail: @email{chrisa@@asty.org}
+
+Or contact the current maintainer: @email{bensberg@@coevern.nl}
+
 @sp 1
 For suggesting improvements: @email{nano-devel@@gnu.org}
 
@@ -719,6 +722,7 @@ With @kbd{M-X} the help lines.
 
 @end table
 
+@sp 1
 Option @code{-z} (@code{--suspendable}) has been removed.
 Suspension is enabled by default, reachable via @kbd{^T^Z}.
 (If you want a plain @kbd{^Z} to suspend nano, add
@@ -734,6 +738,7 @@ or nanorc options.  Each toggle can be flicked via a Meta-key combination
 --- the @kbd{Meta} key is normally the @kbd{Alt} key (@pxref{Commands}
 for more details).  The following global toggles are available:
 
+@sp 1
 @table @code
 
 @item Constant Cursor Position Display
@@ -1371,34 +1376,37 @@ is appropriate.  Strange behavior can result when it is not.
 @sp 1
 The format of @code{key} should be one of:
 
-@itemize @w{}
-@item
-@code{^@var{X}} ------ where @var{X} is a Latin letter, or one of several
+@indentedblock
+@table @asis
+
+@item @code{^@var{X}}
+where @var{X} is a Latin letter, or one of several
 ASCII characters (@@, ], \, ^, _), or the word "Space".
 Example: @code{^C}.
 
-@item
-@code{M-@var{X}} ------ where @var{X} is any ASCII character except [,
-or the word "Space".
+@item @code{M-@var{X}}
+where @var{X} is any ASCII character except [, or the word "Space".
 Example: @code{M-8}.
 
-@item
-@code{Sh-M-@var{X}} ------ where @var{X} is a Latin letter.
+@item @code{Sh-M-@var{X}}
+where @var{X} is a Latin letter.
 Example: @code{Sh-M-U}.
 By default, each Meta+letter keystroke does the same as the corresponding
 Shift+Meta+letter.  But when any Shift+Meta bind is made, that will
 no longer be the case, for all letters.
 
-@item
-@code{F@var{n}} ------ where @var{n} is a numeric value from 1 to 24.
+@item @code{F@var{n}}
+where @var{n} is a numeric value from 1 to 24.
 Example: @code{F10}.
 (Often, @code{F13} to @code{F24} can be typed as @code{F1} to @code{F12}
 with Shift.)
 
-@item
-@code{Ins} or @code{Del}.
-@end itemize
+@item @code{Ins} or @code{Del}
 
+@end table
+@end indentedblock
+
+@sp 1
 Rebinding @code{^M} (Enter) or @code{^I} (Tab) is probably not a good idea.
 Rebinding @code{^[} (Esc) is not possible, because its keycode
 is the starter byte of Meta keystrokes and escape sequences.