Resolve 32/64-bit confusion for Windows editors

Author: ben

book/01-introduction/sections/first-time-setup.asc

@@ -50,14 +50,19 @@ If you want to use a different text editor, such as Emacs, you can do the follow
 $ git config --global core.editor emacs
 ----
 
-While on a Windows system, if you want to use a different text editor, such as Notepad++, you can do the following:
+On a Windows system, if you want to use a different text editor, you must specify the full path to its executable file.
+This can be different depending on how your editor is packaged.
+
+In the case of Notepad++, a popular programming editor, the application is always shipped as a 32-bit executable.
+If you are on a 32-bit Windows system, or you have a 64-bit editor on a 64-bit system, you'll type something like this:
 
-On a x86 system
 [source,console]
 ----
 $ git config --global core.editor "'C:/Program Files/Notepad++/notepad++.exe' -multiInst -nosession"
 ----
-On a x64 system
+
+If you have a 32-bit editor on a 64-bit system, the program will be installed in `C:\Program Files (x86)`:
+
 [source,console]
 ----
 $ git config --global core.editor "'C:/Program Files (x86)/Notepad++/notepad++.exe' -multiInst -nosession"