[dcl.spec.auto.general] Clarify sentence structure by adding bullets (#7450)

Author: mrussoLuxoft

source/declarations.tex

@@ -1771,9 +1771,11 @@
 
 \pnum
 The type of a \grammarterm{parameter-declaration} of a
-function declaration\iref{dcl.fct},
-\grammarterm{lambda-expression}\iref{expr.prim.lambda}, or
-\grammarterm{template-parameter}\iref{temp.param}
+\begin{itemize}
+  \item function declaration\iref{dcl.fct},
+  \item \grammarterm{lambda-expression}\iref{expr.prim.lambda}, or
+  \item \grammarterm{template-parameter}\iref{temp.param}
+\end{itemize}
 can be declared using
 a \grammarterm{placeholder-type-specifier} of the form
 \opt{\grammarterm{type-constraint}} \keyword{auto}.