The "Programmer Art" resource pack is internally called "programer_art". You can check that in the options.txt file, or in a crash report. This might not be a real bug as you can't really see that string ingame, but it's a small annoyance nevertheless.
- Launch Minecraft
- Enable the "Programmer Art" resource pack
- Press F3+C for 10 seconds
- Check the generated crash report
→ The resource pack's name is "programer_art"
- Check options.txt
→ The resource pack's name still is "programer_art"