Correct comment about F being a dangling commit

A commit checked out as HEAD is not dangling because HEAD is referencing it.
jmbtutor · Jun 20, 2018 · ea70478 · ea70478
1 parent c7cbde8
commit ea70478
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/understanding-git.tex b/understanding-git.tex
@@ -629,7 +629,7 @@ \subsection{\gitcmd{checkout}}
     \end{tikzpicture}
   \end{figure}
 
-  \grefspec{F} is a dangling commit.
+  \grefspec{F} will become a dangling commit if \grefspec{HEAD} moves elsewhere.
 \end{frame}
 
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