Made the mistake of using branches instead of tags for the source code links. So all the links are broken after the feature branch was deleted. Here the correct links:

• https://sourceforge.net/p/tutorial-6502/code/ci/v_1.4.1/tree/Atari/Hello_World/CAR_Using_Assembler/src/main/asm/HelloWorld.s
• https://sourceforge.net/p/tutorial-6502/code/ci/v_1.4.1/tree/Atari/Library/OS.inc.s
• https://sourceforge.net/p/tutorial-6502/code/ci/v_1.4.1/tree/Atari/Library/CAR_Header.s
• https://sourceforge.net/p/tutorial-6502/code/ci/v_1.4.1/tree/Atari/Hello_World/CAR_Using_Assembler/Makefile
• https://sourceforge.net/p/tutorial-6502/code/ci/v_1.4.1/tree/Atari/Library/Atari.inc.mak