Remove superfluous center alignment from images

Doxygen uses a <div> with center alignment for images, hence
adding HTML center alignment for image is not only superfluous
but was also inconsistent.

Also removed some more unnecessary HTML tags, updated copyright year.

16 files changed, 38 insertions, 37 deletions

diff --git a/FL/Fl_Counter.H b/FL/Fl_Counter.H
index eaa71f5b4..7553416e7 100644
--- a/FL/Fl_Counter.H
+++ b/FL/Fl_Counter.H
@@ -1,7 +1,7 @@
 //
 // Counter header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2010 by Bill Spitzak and others.
+// Copyright 1998-2022 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
@@ -34,7 +34,7 @@
   Controls a single floating point value with button (or keyboard) arrows.
   Double arrows buttons achieve larger steps than simple arrows.
   \see Fl_Spinner for value input with vertical step arrows.
-  <P align=center>\image html counter.png</P>
+  \image html counter.png
   \image latex counter.png "Fl_Counter" width=4cm
 
   \todo Refactor the doxygen comments for Fl_Counter type() documentation.
diff --git a/FL/Fl_Dial.H b/FL/Fl_Dial.H
index d88416164..e11d3cb26 100644
--- a/FL/Fl_Dial.H
+++ b/FL/Fl_Dial.H
@@ -1,7 +1,7 @@
 //
 // Dial header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2010 by Bill Spitzak and others.
+// Copyright 1998-2022 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
@@ -32,7 +32,7 @@
 /**
   The Fl_Dial widget provides a circular dial to control a
   single floating point value.
-  <P ALIGN=CENTER>\image html dial.png
+  \image html dial.png
   \image latex dial.png "Fl_Dial" width=4cm
   Use type() to set the type of the dial to:
   <UL>
diff --git a/FL/Fl_File_Input.H b/FL/Fl_File_Input.H
index 256157afb..5b2d781cb 100644
--- a/FL/Fl_File_Input.H
+++ b/FL/Fl_File_Input.H
@@ -1,7 +1,7 @@
 //
 // File_Input header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2010 by Bill Spitzak and others.
+// Copyright 1998-2022 by Bill Spitzak and others.
 // Original version Copyright 1998 by Curtis Edwards.
 //
 // This library is free software. Distribution and use rights are outlined in
@@ -34,7 +34,7 @@
   FL_WHEN_RELEASE callback won't be called if the directory clicked
   is the same as the current one.
 
-  <P align=CENTER> \image html Fl_File_Input.png </P>
+  \image html Fl_File_Input.png
   \image latex Fl_File_Input.png "Fl_File_Input"  width=6cm
 
   \note As all Fl_Input derived objects, Fl_File_Input may call its callback
diff --git a/FL/Fl_Light_Button.H b/FL/Fl_Light_Button.H
index 2a3ca1007..2794073f3 100644
--- a/FL/Fl_Light_Button.H
+++ b/FL/Fl_Light_Button.H
@@ -1,7 +1,7 @@
 //
 // Lighted button header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2010 by Bill Spitzak and others.
+// Copyright 1998-2022 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
@@ -30,7 +30,7 @@
 
   Buttons generate callbacks when they are clicked by the user.  You
   control exactly when and how by changing the values for type() and when().
-  <P ALIGN=CENTER>\image html Fl_Light_Button.png</P>
+  \image html  Fl_Light_Button.png
   \image latex Fl_Light_Button.png "Fl_Light_Button" width=4cm
 */
 class FL_EXPORT Fl_Light_Button : public Fl_Button {
diff --git a/FL/Fl_Menu_Button.H b/FL/Fl_Menu_Button.H
index 947f849bb..7eb8e17ff 100644
--- a/FL/Fl_Menu_Button.H
+++ b/FL/Fl_Menu_Button.H
@@ -26,7 +26,7 @@
   This is a button that when pushed pops up a menu (or hierarchy of
   menus) defined by an array of
   Fl_Menu_Item objects.
-  <P ALIGN=CENTER>\image html  menu_button.png</P>
+  \image html  menu_button.png
   \image latex  menu_button.png " menu_button" width=5cm
   <P>Normally any mouse button will pop up a menu and it is lined up
   below the button as shown in the picture.  However an Fl_Menu_Button
diff --git a/FL/Fl_Output.H b/FL/Fl_Output.H
index 06dfeb650..099afbedf 100644
--- a/FL/Fl_Output.H
+++ b/FL/Fl_Output.H
@@ -1,7 +1,7 @@
 //
 // Output header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2011 by Bill Spitzak and others.
+// Copyright 1998-2022 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
@@ -29,7 +29,7 @@
   portions of the text using the mouse and paste the contents into other
   fields or programs.
 
-  <P align=CENTER>\image html text.png</P>
+  \image html text.png
   \image latex text.png "Fl_Output" width=8cm
 
   There is a single subclass, Fl_Multiline_Output, which allows you to
diff --git a/FL/Fl_Positioner.H b/FL/Fl_Positioner.H
index 02d872e03..17963f614 100644
--- a/FL/Fl_Positioner.H
+++ b/FL/Fl_Positioner.H
@@ -1,7 +1,7 @@
 //
 // Positioner header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2010 by Bill Spitzak and others.
+// Copyright 1998-2022 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
@@ -29,8 +29,8 @@
   It would be useful if this could be put atop another widget so that the
   crosshairs are on top, but this is not implemented.  The color of the
   crosshairs is selection_color().
-  <P ALIGN=CENTER>\image html  positioner.png </P>
-  \image latex  positioner.png " Fl_Positioner" width=4cm
+  \image html  positioner.png
+  \image latex positioner.png "Fl_Positioner" width=4cm
 */
 class FL_EXPORT Fl_Positioner : public Fl_Widget {
 
diff --git a/FL/Fl_Return_Button.H b/FL/Fl_Return_Button.H
index 845b15f7d..d998dd31f 100644
--- a/FL/Fl_Return_Button.H
+++ b/FL/Fl_Return_Button.H
@@ -1,7 +1,7 @@
 //
 // Return button header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2010 by Bill Spitzak and others.
+// Copyright 1998-2022 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
@@ -25,7 +25,7 @@
   The Fl_Return_Button is a subclass of Fl_Button that
   generates a callback when it is pressed or when the user presses the
   Enter key.  A carriage-return symbol is drawn next to the button label.
-  <P ALIGN=CENTER>\image html Fl_Return_Button.png
+  \image html Fl_Return_Button.png
   \image latex Fl_Return_Button.png "Fl_Return_Button" width=4cm
 */
 class FL_EXPORT Fl_Return_Button : public Fl_Button {
diff --git a/FL/Fl_Roller.H b/FL/Fl_Roller.H
index 4eeabd300..bd37a886c 100644
--- a/FL/Fl_Roller.H
+++ b/FL/Fl_Roller.H
@@ -1,7 +1,7 @@
 //
 // Roller header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2010 by Bill Spitzak and others.
+// Copyright 1998-2022 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
@@ -32,7 +32,7 @@
   corresponding arrow keys when the roller has the keyboard focus, or by the
   mousewheels when the mouse pointer is positioned over the roller widget.
 
-  <P ALIGN=CENTER>\image html Fl_Roller.png
+  \image html Fl_Roller.png
   \image latex Fl_Roller.png "Fl_Roller" width=4cm
 */
 class FL_EXPORT Fl_Roller : public Fl_Valuator {
diff --git a/FL/Fl_Round_Button.H b/FL/Fl_Round_Button.H
index 8c84e44cf..4994f56ec 100644
--- a/FL/Fl_Round_Button.H
+++ b/FL/Fl_Round_Button.H
@@ -1,7 +1,7 @@
 //
 // Round button header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2014 by Bill Spitzak and others.
+// Copyright 1998-2022 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
@@ -23,9 +23,9 @@
   Buttons generate callbacks when they are clicked by the user.  You
   control exactly when and how by changing the values for type()
   and when().
-  <P ALIGN=CENTER>\image html Fl_Round_Button.png</P>
-  \image latex  Fl_Round_Button.png " Fl_Round_Button" width=4cm
-  <P>The Fl_Round_Button subclass display the "on" state by
+  \image html  Fl_Round_Button.png
+  \image latex Fl_Round_Button.png "Fl_Round_Button" width=4cm
+  The Fl_Round_Button subclass displays the "on" state by
   turning on a light, rather than drawing pushed in.  The shape of the
   "light" is initially set to FL_ROUND_DOWN_BOX.  The color of the light
   when on is controlled with selection_color(), which defaults to
diff --git a/FL/Fl_Simple_Counter.H b/FL/Fl_Simple_Counter.H
index 1ec214740..a91f349d3 100644
--- a/FL/Fl_Simple_Counter.H
+++ b/FL/Fl_Simple_Counter.H
@@ -1,7 +1,7 @@
 //
 // Simple counter header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2010 by Bill Spitzak and others.
+// Copyright 1998-2022 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
@@ -23,7 +23,7 @@
 #include "Fl_Counter.H"
 /**
   This widget creates a counter with only 2 arrow buttons
-  <P align=center>\image html counter.png</P>
+  \image html counter.png
   \image latex  counter.png "Fl_Simple_Counter" width=4cm
 */
 class FL_EXPORT Fl_Simple_Counter : public Fl_Counter {
diff --git a/FL/Fl_Valuator.H b/FL/Fl_Valuator.H
index d8288b7ed..9eaf2eaac 100644
--- a/FL/Fl_Valuator.H
+++ b/FL/Fl_Valuator.H
@@ -1,7 +1,7 @@
 //
 // Valuator header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2016 by Bill Spitzak and others.
+// Copyright 1998-2022 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
@@ -35,7 +35,7 @@
 
   There are probably more of these classes in FLTK than any others:
 
-  <P ALIGN=CENTER>\image html valuators.png</P>
+  \image html  valuators.png
   \image latex valuators.png "Valuators derived from Fl_Valuators" width=10cm
 
   In the above diagram each box surrounds an actual subclass.  These
diff --git a/FL/Fl_Value_Input.H b/FL/Fl_Value_Input.H
index 995b36a00..03f9814b3 100644
--- a/FL/Fl_Value_Input.H
+++ b/FL/Fl_Value_Input.H
@@ -1,7 +1,7 @@
 //
 // Value input header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2010 by Bill Spitzak and others.
+// Copyright 1998-2022 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
@@ -44,12 +44,13 @@
   is therefore impossible to select text by dragging across it,
   although clicking can still move the insertion cursor.</P>
 
-  <P>If step() is non-zero and integral, then the range
+  If step() is non-zero and integral, then the range
   of numbers are limited to integers instead of floating point
   values.
 
-  <P ALIGN="CENTER">\image html Fl_Value_Input.png
+  \image html Fl_Value_Input.png
   \image latex  Fl_Value_Input.png "Fl_Value_Input" width=4cm
+
   \see Fl_Widget::shortcut_label(int)
 */
 class FL_EXPORT Fl_Value_Input : public Fl_Valuator {
diff --git a/FL/Fl_Value_Output.H b/FL/Fl_Value_Output.H
index 6a2e7e900..c78383286 100644
--- a/FL/Fl_Value_Output.H
+++ b/FL/Fl_Value_Output.H
@@ -1,7 +1,7 @@
 //
 // Value output header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2010 by Bill Spitzak and others.
+// Copyright 1998-2022 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
@@ -33,8 +33,8 @@
   <P>This is much lighter-weight than
   Fl_Value_Input because it contains no text editing code or
   character buffer. </P>
-  <P ALIGN=CENTER>\image html Fl_Value_Output.png
-  \image latex  Fl_Value_Output.png "Fl_Value_Output" width=4cm
+  \image html  Fl_Value_Output.png
+  \image latex Fl_Value_Output.png "Fl_Value_Output" width=4cm
 */
 class FL_EXPORT Fl_Value_Output : public Fl_Valuator {
   Fl_Font textfont_;
diff --git a/FL/Fl_Value_Slider.H b/FL/Fl_Value_Slider.H
index b139de71b..53d264de7 100644
--- a/FL/Fl_Value_Slider.H
+++ b/FL/Fl_Value_Slider.H
@@ -1,7 +1,7 @@
 //
 // Value slider header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2010 by Bill Spitzak and others.
+// Copyright 1998-2022 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
@@ -25,7 +25,7 @@
 /**
   The Fl_Value_Slider widget is a Fl_Slider widget
   with a box displaying the current value.
-  <P ALIGN=CENTER>\image html value_slider.png
+  \image html value_slider.png
   \image latex  value_slider.png "Fl_Value_Slider" width=4cm
 */
 class FL_EXPORT Fl_Value_Slider : public Fl_Slider {
diff --git a/src/Fl_Help_Dialog_Dox.cxx b/src/Fl_Help_Dialog_Dox.cxx
index 9461d9e23..5be2a9fcc 100644
--- a/src/Fl_Help_Dialog_Dox.cxx
+++ b/src/Fl_Help_Dialog_Dox.cxx
@@ -1,7 +1,7 @@
 //
 // Fl_Help_Dialog dialog for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2010 by Bill Spitzak and others.
+// Copyright 1998-2022 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
@@ -23,8 +23,8 @@
   The Fl_Help_Dialog class is not part of the FLTK core library, but instead
   of \em fltk_images. Use \c --use-images when compiling with \c fltk-config .
 
-  <P ALIGN=CENTER> \image html Fl_Help_Dialog.png </P>
-  \image latex  Fl_Help_Dialog.png "Fl_Help_Dialog" width=8cm
+  \image html  Fl_Help_Dialog.png </P>
+  \image latex Fl_Help_Dialog.png "Fl_Help_Dialog" width=8cm
 */
 
 /** \fn Fl_Help_Dialog::Fl_Help_Dialog()