Fix case for 'Unix'
diff --git a/Doc/lib/libcsv.tex b/Doc/lib/libcsv.tex
index e600815..a9f490d 100644
--- a/Doc/lib/libcsv.tex
+++ b/Doc/lib/libcsv.tex
@@ -76,7 +76,7 @@
file in a way that preserves the newlines. The behavior before 2.5 would
introduce spurious characters into quoted fields, with no way for the user
to control that behavior. The previous behavior caused considerable
-problems, particularly on platforms that did not use the unix line ending
+problems, particularly on platforms that did not use the Unix line ending
conventions, or with files that originated on those platforms --- users were
finding mysterious newlines where they didn't expect them]{2.5}
diff --git a/Doc/lib/tkinter.tex b/Doc/lib/tkinter.tex
index 405f041..0cc8d58 100644
--- a/Doc/lib/tkinter.tex
+++ b/Doc/lib/tkinter.tex
@@ -319,7 +319,7 @@
\item[\var{options} ]
configure the widget's appearance and in some cases, its
behavior. The options come in the form of a list of flags and values.
-Flags are proceeded by a `-', like unix shell command flags, and
+Flags are proceeded by a `-', like Unix shell command flags, and
values are put in quotes if they are more than one word.
\end{description}