Remove no longer necessary #include <ctype.h>

... after replacing character class function calls with fl_ascii_*().

src/Fl.cxx

@@ -28,7 +28,6 @@
 #include <FL/Fl_Tooltip.H>
 #include <FL/fl_draw.H>
 
-#include <ctype.h>
 #include <stdlib.h>
 #include "flstring.h"
 

src/Fl_File_Icon2.cxx

@@ -36,7 +36,6 @@
 #include <stdlib.h>
 #include <FL/fl_utf8.h>
 #include "flstring.h"
-#include <ctype.h>
 #include <errno.h>
 #include <FL/math.h>
 #include <FL/Fl_File_Icon.H>

src/Fl_Help_View.cxx

@@ -41,7 +41,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdint.h>
-#include <ctype.h>
 #include <errno.h>
 #include <math.h>
 #include <map>

src/Fl_Input_.cxx

@@ -24,7 +24,6 @@
 #include <FL/fl_utf8.h>
 #include "flstring.h"
 #include <stdlib.h>
-#include <ctype.h>
 
 #define MAXBUF 1024
 static int l_secret;

src/Fl_MacOS_Sys_Menu_Bar.mm

@@ -21,7 +21,6 @@
 #include "drivers/Cocoa/Fl_MacOS_Sys_Menu_Bar_Driver.H"
 #include "flstring.h"
 #include <stdio.h>
-#include <ctype.h>
 #include <stdarg.h>
 #include "Fl_System_Driver.H"
 

src/Fl_Pixmap.cxx

@@ -30,7 +30,6 @@
 #include "flstring.h"
 
 #include <stdio.h>
-#include <ctype.h>
 
 void Fl_Pixmap::measure() {
   int W, H;

src/Fl_Shortcut_Button.cxx

@@ -22,9 +22,6 @@
 #include "Fl_System_Driver.H"
 #include "flstring.h"
 
-#include <ctype.h>
-
-
 /** \class Fl_Shortcut_Button
  A button that allows the user to type a key combination to create shortcuts.
  After clicked once, the button catches the following keyboard events and

src/Fl_Terminal.cxx

@@ -2,7 +2,7 @@
 // Fl_Terminal - A terminal widget for Fast Light Tool Kit (FLTK).
 //
 // Copyright 2022 by Greg Ercolano.
-// Copyright 2024 by Bill Spitzak and others.
+// Copyright 2024-2026 by Bill Spitzak and others.
 //
 // This library is free software. Distribution and use rights are outlined in
 // the file "COPYING" which should have been included with this file.  If this
@@ -24,10 +24,9 @@
 #define NDEBUG          // comment out to enable assert()
 #endif
 
-#include <ctype.h>      // isdigit
 #include <stdlib.h>     // malloc
 #include <string.h>     // strlen
-#include <stdarg.h>     // vprintf, va_list
+#include <stdarg.h>     // va_list
 #include <assert.h>
 #include <string>
 

src/Fl_Text_Buffer.cxx

@@ -19,7 +19,6 @@
 #include <FL/fl_utf8.h>
 #include <FL/fl_string_functions.h>
 #include "flstring.h"
-#include <ctype.h>
 #include <FL/Fl.H>
 #include <FL/Fl_Text_Buffer.H>
 #include <FL/fl_ask.H>

src/Fl_Text_Display.cxx

@@ -23,7 +23,6 @@
 #include <FL/fl_string_functions.h>     // fl_strdup()
 #include "flstring.h"
 #include <limits.h>
-#include <ctype.h>
 #include <string.h>
 #include <FL/Fl.H>
 #include <FL/platform.H>

src/Fl_Text_Editor.cxx

@@ -18,7 +18,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include "flstring.h"
-#include <ctype.h>
 #include <FL/Fl.H>
 #include <FL/Fl_Window.H>
 #include <FL/Fl_Text_Editor.H>

src/Fl_arg.cxx

@@ -1,7 +1,7 @@
 //
 // Optional argument initialization code for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2024 by Bill Spitzak and others.
+// Copyright 1998-2026 by Bill Spitzak and others.
 //
 // This library is free software. Distribution and use rights are outlined in
 // the file "COPYING" which should have been included with this file.  If this
@@ -25,8 +25,6 @@
 #include "Fl_Screen_Driver.H"
 #include "flstring.h"
 
-#include <ctype.h>
-
 static int fl_match(const char *a, const char *s, int atleast = 1) {
   const char *b = s;
   while (*a && (*a == *b || fl_ascii_tolower(*a) == *b)) {a++; b++;}

src/filename_match.cxx

@@ -19,7 +19,6 @@
 
 
 #include <FL/filename.H>
-#include <ctype.h>
 
 /**
     Checks if a string \p s matches a pattern \p p.

src/fl_draw.cxx

@@ -30,7 +30,6 @@
 #include "flstring.h"
 #include "fl_oxy.h"
 
-#include <ctype.h>
 #include <math.h>
 #include <stdlib.h>
 

src/fl_shortcut.cxx

@@ -38,7 +38,6 @@
 #include "Fl_Screen_Driver.H"
 #include <FL/fl_draw.H>
 #include <stdlib.h>
-#include <ctype.h>
 #include "flstring.h"
 
 /**

src/flstring.h

@@ -34,7 +34,6 @@
 #  ifdef HAVE_STRINGS_H
 #    include <strings.h>
 #  endif /* HAVE_STRINGS_H */
-#  include <ctype.h>
 #  include <FL/fl_string_functions.h>
 
 /*

src/xutf8/utf8Wrap.c

@@ -22,14 +22,12 @@
 #include "../Xutf8.h"
 #include <X11/Xlib.h>
 #include <FL/fl_string_functions.h>  // fl_strdup()
-#include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 #include "../utf8_internal.h"
 #include "../flstring.h"
 
-
 /* External auto generated functions : */
 #include "ucs2fontmap.c"
 /*