Fix spelling

chapters/annotations.tex

@@ -188,11 +188,9 @@ \subsubsection{Plot Curves}\label{plot-curves}
 end Curve;
 \end{lstlisting}
 
-The mandatory \lstinline!x! and \lstinline!y! expressions are restricted to be
-component references refering to a scalar variable or \lstinline!time!. It
-is an error if \lstinline!x! or \lstinline!y! does not designate a scalar variable.
-When the \lstinline!unit! of an \lstinline!Axis! is non-empty, it is an error if the unit of the corresponding \lstinline!Curve! expression (i.e., a variable's \lstinline!unit!,
-or second for \lstinline!time!) is incompatible with the axis unit.
+The mandatory \lstinline!x! and \lstinline!y! expressions are restricted to be component references referring to a scalar variable or \lstinline!time!.
+It is an error if \lstinline!x! or \lstinline!y! does not designate a scalar variable.
+When the \lstinline!unit! of an \lstinline!Axis! is non-empty, it is an error if the unit of the corresponding \lstinline!Curve! expression (i.e., a variable's \lstinline!unit!, or second for \lstinline!time!) is incompatible with the axis unit.
 
 When \lstinline!legend! isn't provided, the tool produces a default based on
 \lstinline!x! and/or \lstinline!y!.  Providing the empty string as
@@ -224,7 +222,8 @@ \subsubsection{Escape sequences}\label{text-markup-escape-sequences}
 
 \subsubsection{Variable Replacements}\label{variable-replacements}
 
-In the places listed in \cref{attributes-with-variable-replacements} where text for display is defined, the final value of a result variable can be embedded by refering to the variable as \lstinline!%{inertia1.w}!.  This is similar to the \lstinline!Text! graphical primitive in \cref{text}.
+In the places listed in \cref{attributes-with-variable-replacements} where text for display is defined, the final value of a result variable can be embedded by referring to the variable as \lstinline!%{inertia1.w}!.
+This is similar to the \lstinline!Text! graphical primitive in \cref{text}.
 
 \begin{table}[H]
 \caption{Attributes that can use variable replacements.}