Remove erroneous double quote

Author: robertpjday

book/02-git-basics/sections/undoing.asc

@@ -36,7 +36,7 @@ You end up with a single commit – the second commit replaces the results of th
 It's important to understand that when you're amending your last commit, you're not so much fixing it as _replacing_ it entirely with a new, improved commit that pushes the old commit out of the way and puts the new commit in its place.
 Effectively, it's as if the previous commit never happened, and it won't show up in your repository history.
 
-The obvious value to amending commits is to make minor improvements to your last commit, without cluttering your repository history with commit messages of the form, ``Oops, forgot to add a file'' or ``"Darn, fixing a typo in last commit''.
+The obvious value to amending commits is to make minor improvements to your last commit, without cluttering your repository history with commit messages of the form, ``Oops, forgot to add a file'' or ``Darn, fixing a typo in last commit''.
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 [[_unstaging]]