Serenity OS commit: 3ba3d2d
Running on: QEMU, Ubuntu 20, x64

Behavior:

• Open HackStudio
• Create a new file, TestFile.txt
• Type in a word and hit "Tab"(ulator) then newline
• Type in a word and hit space 3 times
• Save file
• Observe hexdump

Expected behavior:
The tab is saved as a tab, ASCII 0x09. Spaces are saved as spaces (0x20)

Actual output:

$ hexdump TestFile.txt
74 65 73 74 20 20 20 20   0a 74 65 73 74 20 20 20   test     test
0a

The test<tab><newline> has been converted into test<space><space><space><space><newline>.

This issue prevents me writing a Makefile in HackStudio itself; The Makefile needs tab as a prefix to certain things, not spaces, but the editor won't let save them as such; There's also no setting to disable this tab-to-spaces conversion and the user is not informed about this.