Avoid incorrect sentence parsing option on types

Signed-off-by: Mauro Russo <[email protected]>

source/declarations.tex

@@ -1770,10 +1770,11 @@
 from an initializer.
 
 \pnum
-The type of a \grammarterm{parameter-declaration} of a
-function declaration\iref{dcl.fct},
+The type of a \grammarterm{parameter-declaration} of
+any of the following three:
+a function declaration\iref{dcl.fct},
 \grammarterm{lambda-expression}\iref{expr.prim.lambda}, or
-\grammarterm{template-parameter}\iref{temp.param}
+\grammarterm{template-parameter}\iref{temp.param},
 can be declared using
 a \grammarterm{placeholder-type-specifier} of the form
 \opt{\grammarterm{type-constraint}} \keyword{auto}.