Reformat Warning text as requested in PR

Add a line-break so sentences are on separate lines.

Author: wturrell

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

@@ -71,7 +71,8 @@ If you are not familiar with these editors, you may need to search for specific
 
 [WARNING]
 ====
-You may find, if you don't setup your editor like this, you get into a really confusing state when Git attempts to launch it. An example on a Windows system may include a prematurely terminated Git operation during a Git initiated edit.
+You may find, if you don't setup your editor like this, you get into a really confusing state when Git attempts to launch it.
+An example on a Windows system may include a prematurely terminated Git operation during a Git initiated edit.
 ====
 
 ==== Checking Your Settings