docs: remove the note about the formatter having been removed

The 'fixer' command has taken the place of the 'formatter' command.

(Also, normalize a double blank line before a chapter.)

doc/nano.texi

@@ -57,9 +57,9 @@ You may contact the author by
 e-mail: @email{chrisa@@asty.org}@*
 @end titlepage
 
-
 @ifnottex
 
+
 @node Top
 @top
 
@@ -156,6 +156,7 @@ As a special case: when instead of a filename a dash is given, @command{nano}
 will read data from standard input.  This means you can pipe the output of
 a command straight into a buffer, and then edit it.
 
+
 @node Command-line Options
 @chapter Command-line Options
 
@@ -614,6 +615,7 @@ The recording and playback of keyboard macros works correctly only on a
 terminal emulator, not on a Linux console (VT), because the latter does
 not by default distinguish modified from unmodified arrow keys.
 
+
 @node Built-in Help
 @chapter Built-in Help
 
@@ -1114,22 +1116,6 @@ in one of the system-installed files (which normally are not writable).
 
 @end table
 
-Note: the @code{formatter} command has been removed.  It was superseded by
-a more general mechanism: the filtering of buffer or marked text through
-an external command.  Such filtering is done by typing @code{^R^X} and then
-preceding your formatter command with the pipe symbol (@code{|}).  It has
-the added advantage that the operation can be undone.
-
-If you use such a formatting command regularly, you could assign the relevant
-series of keystrokes to a single key in your nanorc:
-
-@example
-   bind  M-F  "^R^X|yourformatcommand^M"  main
-@end example
-
-(Note that the @key{^R}, @key{^X}, and @key{^M} are each a single, literal
-control character.  You can enter them by preceding each with @key{M-V}.)
-
 @node Rebinding Keys
 @section Rebinding Keys
 

doc/nanorc.5

@@ -449,23 +449,6 @@ command to an already defined syntax -- useful when you want to
 slightly improve a syntax defined in one of the system-installed
 files (which normally are not writable).
 
-.P
-Note: the \fBformatter\fR command has been removed.  It was superseded by
-a more general mechanism: the filtering of buffer or marked text through
-an external command.  Such filtering is done by typing \fB^R^X\fR and then
-preceding your formatter command with the pipe symbol (\fB|\fR).  It has
-the added advantage that the operation can be undone.
-.sp
-If you use such a formatting command regularly, you could assign the relevant
-series of keystrokes to a single key in your nanorc:
-.sp
-.RS
-.B "bind  M\-F  \(dq^R^X|yourformatcommand^M\(dq  main"
-.RE
-.sp
-(Note that the \fB^R\fR, \fB^X\fR, and \fB^M\fR are each a single, literal
-control character.  You can enter them by preceding each with \fBM\-V\fR.)
-
 .SH REBINDING KEYS
 Key bindings can be changed via the following three commands:
 .RS 3
@@ -480,7 +463,6 @@ Makes the given \fIkey\fR produce the given \fIstring\fR in the given
 The \fIstring\fR can consist of text or commands or a mix of them.
 (To enter a command into the \fIstring\fR, precede its keystroke
 with \fBM\-V\fR.)
-
 .TP
 .BI unbind " key menu"
 Unbinds the given \fIkey\fP from the given \fImenu\fP (or from all