tweaks: rename five empty functions, to get rid of a meaningless suffix

For consistency, these five names ought to start with "flip_", but
then the bindable functions would need to be renamed too, and that
would be annoying for the user, *and* it would create too many names
that start with "flip" -- it wouldn't be distinctive any more.

src/files.c

@@ -2185,17 +2185,17 @@ int do_writeout(bool exiting, bool withprompt)
 		} else
 #endif
 #ifndef NANO_TINY
-		if (func == dos_format_void) {
+		if (func == dos_format) {
 			openfile->fmt = (openfile->fmt == DOS_FILE) ? NIX_FILE : DOS_FILE;
 			continue;
-		} else if (func == mac_format_void) {
+		} else if (func == mac_format) {
 			openfile->fmt = (openfile->fmt == MAC_FILE) ? NIX_FILE : MAC_FILE;
 			continue;
-		} else if (func == backup_file_void) {
+		} else if (func == back_it_up) {
 			TOGGLE(MAKE_BACKUP);
 			continue;
-		} else if (func == prepend_void || func == append_void) {
+		} else if (func == prepend_it || func == append_it) {
-			if (func == prepend_void)
+			if (func == prepend_it)
 				method = (method == PREPEND) ? OVERWRITE : PREPEND;
 			else
 				method = (method == APPEND) ? OVERWRITE : APPEND;

src/global.c

@@ -312,19 +312,19 @@ void do_nothing(void)
 void do_toggle_void(void)
 {
 }
-void dos_format_void(void)
+void dos_format(void)
 {
 }
-void mac_format_void(void)
+void mac_format(void)
 {
 }
-void append_void(void)
+void append_it(void)
 {
 }
-void prepend_void(void)
+void prepend_it(void)
 {
 }
-void backup_file_void(void)
+void back_it_up(void)
 {
 }
 void flip_execute(void)
@@ -1111,9 +1111,9 @@ void shortcut_init(void)
 #endif
 
 #ifndef NANO_TINY
-	add_to_funcs(dos_format_void, MWRITEFILE,
+	add_to_funcs(dos_format, MWRITEFILE,
 		N_("DOS Format"), WITHORSANS(dos_gist), TOGETHER, NOVIEW);
-	add_to_funcs(mac_format_void, MWRITEFILE,
+	add_to_funcs(mac_format, MWRITEFILE,
 		N_("Mac Format"), WITHORSANS(mac_gist), TOGETHER, NOVIEW);
 
 	/* If we're using restricted mode, the Append, Prepend, and Backup toggles
@@ -1121,12 +1121,12 @@ void shortcut_init(void)
 	 * reduplicating the current file, and the third is not allowed as it
 	 * would write to a file not specified on the command line. */
 	if (!ISSET(RESTRICTED)) {
-		add_to_funcs(append_void, MWRITEFILE,
+		add_to_funcs(append_it, MWRITEFILE,
 			N_("Append"), WITHORSANS(append_gist), TOGETHER, NOVIEW);
-		add_to_funcs(prepend_void, MWRITEFILE,
+		add_to_funcs(prepend_it, MWRITEFILE,
 			N_("Prepend"), WITHORSANS(prepend_gist), TOGETHER, NOVIEW);
 
-		add_to_funcs(backup_file_void, MWRITEFILE,
+		add_to_funcs(back_it_up, MWRITEFILE,
 			N_("Backup File"), WITHORSANS(backup_gist), BLANKAFTER, NOVIEW);
 	}
 
@@ -1461,14 +1461,14 @@ void shortcut_init(void)
 	if (ISSET(SAVE_ON_EXIT) && !ISSET(PRESERVE))
 		add_to_sclist(MWRITEFILE, "^Q", 0, discard_buffer, 0);
 #ifndef NANO_TINY
-	add_to_sclist(MWRITEFILE, "M-D", 0, dos_format_void, 0);
+	add_to_sclist(MWRITEFILE, "M-D", 0, dos_format, 0);
-	add_to_sclist(MWRITEFILE, "M-M", 0, mac_format_void, 0);
+	add_to_sclist(MWRITEFILE, "M-M", 0, mac_format, 0);
 	/* Only when not in restricted mode, allow Appending, Prepending,
 	 * making backups, and executing a command. */
 	if (!ISSET(RESTRICTED) && !ISSET(VIEW_MODE)) {
-		add_to_sclist(MWRITEFILE, "M-A", 0, append_void, 0);
+		add_to_sclist(MWRITEFILE, "M-A", 0, append_it, 0);
-		add_to_sclist(MWRITEFILE, "M-P", 0, prepend_void, 0);
+		add_to_sclist(MWRITEFILE, "M-P", 0, prepend_it, 0);
-		add_to_sclist(MWRITEFILE, "M-B", 0, backup_file_void, 0);
+		add_to_sclist(MWRITEFILE, "M-B", 0, back_it_up, 0);
 		add_to_sclist(MINSERTFILE|MEXECUTE, "^X", 0, flip_execute, 0);
 	}
 	add_to_sclist(MINSERTFILE, "M-N", 0, flip_convert, 0);

src/prototypes.h

@@ -643,11 +643,11 @@ void goto_dir(void);
 #ifndef NANO_TINY
 void do_nothing(void);
 void do_toggle_void(void);
-void dos_format_void(void);
+void dos_format(void);
-void mac_format_void(void);
+void mac_format(void);
-void append_void(void);
+void append_it(void);
-void prepend_void(void);
+void prepend_it(void);
-void backup_file_void(void);
+void back_it_up(void);
 void flip_execute(void);
 void flip_pipe(void);
 void flip_convert(void);

src/rcfile.c

@@ -415,15 +415,15 @@ keystruct *strtosc(const char *input)
 #endif
 #ifndef NANO_TINY
 	else if (!strcmp(input, "dosformat"))
-		s->func = dos_format_void;
+		s->func = dos_format;
 	else if (!strcmp(input, "macformat"))
-		s->func = mac_format_void;
+		s->func = mac_format;
 	else if (!strcmp(input, "append"))
-		s->func = append_void;
+		s->func = append_it;
 	else if (!strcmp(input, "prepend"))
-		s->func = prepend_void;
+		s->func = prepend_it;
 	else if (!strcmp(input, "backup"))
-		s->func = backup_file_void;
+		s->func = back_it_up;
 	else if (!strcmp(input, "flipexecute"))
 		s->func = flip_execute;
 	else if (!strcmp(input, "flippipe"))