Fix more misuses of \grammarterm

Author: timsong-cpp

source/basic.tex

@@ -714,7 +714,7 @@
 
 \pnum
 The point of declaration for an
-\grammarterm{injected-class-name} (Clause~\ref{class}) is immediately following
+injected-class-name (Clause~\ref{class}) is immediately following
 the opening brace of the class definition.
 
 \pnum

source/classes.tex

@@ -64,8 +64,7 @@
 A \grammarterm{class-name} is inserted into the scope in which it is
 declared immediately after the \grammarterm{class-name} is seen. The
 \grammarterm{class-name} is also inserted into the scope of the class
-itself; this is known as the \grammarterm{injected-class-name}.
-\indextext{\idxgram{injected-class-name}}%
+itself; this is known as the \defn{injected-class-name}.
 For purposes of access checking, the injected-class-name is treated as
 if it were a public member name.
 \indextext{definition!class}%

source/declarators.tex

@@ -2110,7 +2110,7 @@
     attribute-specifier-seq\opt decl-specifier-seq\opt declarator virt-specifier-seq\opt{} \terminal{ = default ;}
 \end{ncbnf}
 
-is called an \grammarterm{explicitly-defaulted} definition.
+is called an \term{explicitly-defaulted} definition.
 A function that is explicitly defaulted shall
 
 \begin{itemize}

source/overloading.tex

@@ -10,7 +10,7 @@
 \indextext{function, overloaded|see{overloading}}%
 When two or more different declarations are specified for a single name
 in the same scope, that name is said to be
-\grammarterm{overloaded}.
+\term{overloaded}.
 By extension, two declarations in the same scope that declare the same name
 but with different types are called
 \term{overloaded declarations}.