Remove $Id$ tags, update URL's, and more

- remove obsolete svn '$Id$' tags from all source files
- update .fl files and generated files accordingly
- replace 'http://www.fltk.org' URL's with 'https://...'
- replace bug report URL 'str.php' with 'bugs.php'
- remove trailing whitespace
- fix other whitespace errors flagged by Git
- add and/or fix missing or wrong standard headers
- convert tabs to spaces in all source files

The only relevant code changes are in the fluid/ folder where
some .fl files and other source files were used to generate
the '$Id' headers and footers.

1 files changed, 36 insertions, 38 deletions

diff --git a/documentation/CMakeLists.txt b/documentation/CMakeLists.txt
index b27568bf4..66546cfa6 100644
--- a/documentation/CMakeLists.txt
+++ b/documentation/CMakeLists.txt
@@ -1,6 +1,4 @@
 #
-# "$Id$"
-#
 # CMakeLists.txt to build docs for the FLTK project using CMake (www.cmake.org)
 #
 # Copyright 1998-2020 by Bill Spitzak and others.
@@ -11,9 +9,9 @@
 #
 #     https://www.fltk.org/COPYING.php
 #
-# Please report all bugs and problems on the following page:
+# Please see the following page on how to report bugs and issues:
 #
-#     https://www.fltk.org/str.php
+#     https://www.fltk.org/bugs.php
 #
 
 set (DOCS)
@@ -36,29 +34,29 @@ if (OPTION_BUILD_HTML_DOCUMENTATION)
 
     # generate Doxygen file "Doxyfile"
 
-    set(GENERATE_HTML	YES)
-    set(GENERATE_LATEX	NO)
-    set(LATEX_HEADER	"")
+    set(GENERATE_HTML   YES)
+    set(GENERATE_LATEX  NO)
+    set(LATEX_HEADER    "")
 
     configure_file(
-	${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in
-	${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
-	@ONLY
+        ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in
+        ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
+        @ONLY
     )
 
     configure_file(
-	${CMAKE_CURRENT_SOURCE_DIR}/src/tiny.png
-	${CMAKE_CURRENT_BINARY_DIR}/html/tiny.png
-	COPYONLY
+        ${CMAKE_CURRENT_SOURCE_DIR}/src/tiny.png
+        ${CMAKE_CURRENT_BINARY_DIR}/html/tiny.png
+        COPYONLY
     )
 
     # generate html docs
 
     add_custom_target(html
-	# ALL
-	${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
-	WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-	COMMENT "Generating HTML documentation" VERBATIM
+        # ALL
+        ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
+        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+        COMMENT "Generating HTML documentation" VERBATIM
     )
 
 endif (OPTION_BUILD_HTML_DOCUMENTATION)
@@ -73,14 +71,14 @@ if (OPTION_BUILD_PDF_DOCUMENTATION)
 
     # generate Doxygen file "Doxybook"
 
-    set(GENERATE_HTML	NO)
-    set(GENERATE_LATEX	YES)
-    set(LATEX_HEADER	"${CMAKE_CURRENT_BINARY_DIR}/fltk-book.tex")
+    set(GENERATE_HTML   NO)
+    set(GENERATE_LATEX  YES)
+    set(LATEX_HEADER    "${CMAKE_CURRENT_BINARY_DIR}/fltk-book.tex")
 
     configure_file(
-	${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in
-	${CMAKE_CURRENT_BINARY_DIR}/Doxybook
-	@ONLY
+        ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in
+        ${CMAKE_CURRENT_BINARY_DIR}/Doxybook
+        @ONLY
     )
 
     # generate LaTeX header fltk-book.tex
@@ -88,30 +86,30 @@ if (OPTION_BUILD_PDF_DOCUMENTATION)
     set(FL_VERSION ${FLTK_VERSION_FULL})
     set(DOXY_VERSION ${DOXYGEN_VERSION})
     execute_process(COMMAND date +%Y
-	OUTPUT_VARIABLE YEAR
+        OUTPUT_VARIABLE YEAR
     )
 
     configure_file(${CMAKE_CURRENT_SOURCE_DIR}/src/fltk-book.tex.in
-	${CMAKE_CURRENT_BINARY_DIR}/fltk-book.tex
-	@ONLY
+        ${CMAKE_CURRENT_BINARY_DIR}/fltk-book.tex
+        @ONLY
     )
 
     # generate fltk.pdf
 
     add_custom_command(
-	OUTPUT  ${CMAKE_CURRENT_BINARY_DIR}/fltk.pdf
-	COMMAND ${DOXYGEN_EXECUTABLE} Doxybook
-	COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/make_pdf
-	COMMAND cp -f latex/refman.pdf fltk.pdf
-	WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-	COMMENT "Generating PDF documentation" VERBATIM
+        OUTPUT  ${CMAKE_CURRENT_BINARY_DIR}/fltk.pdf
+        COMMAND ${DOXYGEN_EXECUTABLE} Doxybook
+        COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/make_pdf
+        COMMAND cp -f latex/refman.pdf fltk.pdf
+        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+        COMMENT "Generating PDF documentation" VERBATIM
     )
 
     # add target 'pdf'
 
     add_custom_target(pdf
-	# ALL
-	DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/fltk.pdf
+        # ALL
+        DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/fltk.pdf
     )
 
 endif(OPTION_BUILD_PDF_DOCUMENTATION)
@@ -123,8 +121,8 @@ endif(OPTION_BUILD_PDF_DOCUMENTATION)
 if (DOCS)
 
     add_custom_target(docs
-	# ALL
-	DEPENDS ${DOCS}
+        # ALL
+        DEPENDS ${DOCS}
     )
 
 endif (DOCS)
@@ -136,7 +134,7 @@ endif (DOCS)
 if (OPTION_INSTALL_HTML_DOCUMENTATION AND OPTION_BUILD_HTML_DOCUMENTATION)
 
     install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/html
-	DESTINATION ${FLTK_DATADIR}/doc/fltk
+        DESTINATION ${FLTK_DATADIR}/doc/fltk
     )
 
 endif (OPTION_INSTALL_HTML_DOCUMENTATION AND OPTION_BUILD_HTML_DOCUMENTATION)
@@ -144,7 +142,7 @@ endif (OPTION_INSTALL_HTML_DOCUMENTATION AND OPTION_BUILD_HTML_DOCUMENTATION)
 if (OPTION_INSTALL_PDF_DOCUMENTATION AND OPTION_BUILD_PDF_DOCUMENTATION)
 
     install(FILES ${CMAKE_CURRENT_BINARY_DIR}/fltk.pdf
-	DESTINATION ${FLTK_DATADIR}/doc/fltk/
+        DESTINATION ${FLTK_DATADIR}/doc/fltk/
     )
 
 endif (OPTION_INSTALL_PDF_DOCUMENTATION AND OPTION_BUILD_PDF_DOCUMENTATION)