Improve language

Correct usage of braces vs brackets
Rewrite first sentence to flow better, and to explain the braces situation a bit better.
Remove "either" from the second sentence, as I think the sentence is better without that word. The "or" in the middle of the sentence makes it clear that there are two choices to deal with the bracket issue. So "either" is not really adding value.

Co-authored-by: HonkingGoose <[email protected]>

Author: 2 people

book/07-git-tools/sections/revision-selection.asc

@@ -181,11 +181,11 @@ If you have a UNIX or Linux background, you can think of the reflog as Git's ver
 ====
 
 [NOTE]
-.Escaping brackets in PowerShell
+.Escaping braces in PowerShell
 ====
 
-On Windows in `powershell.exe`, `{` and `}` are special characters and needs to be treated differently.
-You can either escape them with a backtick ` or put the commit reference in quotes:
+When using PowerShell on Windows, braces like `{` and `}` are special characters and must be escaped.
+You can escape them with a backtick ` or put the commit reference in quotes:
 
 [source,console]
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