What editor can open Inno Setup sources?

Question

IDE

https://github.com/jrsoftware/issrc/
How to edit a project in general?
I'm interested in the debugger and the compiler, because the debugger is simply miserable there. To finish it). True, I still don’t know what I’m aiming at, whether it will be difficult to do it at all. And in general, are there debugger sources at this link on the github. I did not sit and delve into the name of each file from the Windows explorer. From the IDE, you can still sit and chat, search, read.
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So I myself found the answer on the github.
Install Borland Delphi
Unicode Inno Setup:
We compile all of Inno Setup's projects under Delphi 2009 with Update 3.
Newer Delphi versions should also work but will lead to significantly larger files.
To work with the Delphi 2009 IDE under Windows 8.1 you need these two things to make it work well:
www.jrsoftware.org/files/Delphi_2007_2009_WOW64_De... (md5sum: 545fc506c0614cf7a3339a7acb5217dc)
www.jrsoftware.org/files/dzEditorLineEndsFix.exe ( md5sum: c9598cf14452dd08987c5aec23d04f7d)