[dcl.enum] Add missing \mathit around min/max subscripts.

Author: Eelis

source/declarations.tex

@@ -2129,14 +2129,14 @@
 the enumeration are the values of the underlying type. Otherwise,
 for an enumeration where $e_\mathit{min}$ is the smallest enumerator and
 $e_\mathit{max}$ is the largest, the values of the enumeration are the
-values in the range $b_{min}$ to $b_{max}$, defined as follows: Let $K$
+values in the range $b_\mathit{min}$ to $b_\mathit{max}$, defined as follows: Let $K$
 be 1 for a two's complement representation and 0 for a ones' complement
-or sign-magnitude representation. $b_{max}$ is the smallest value
-greater than or equal to $max(|e_{min}| - K, |e_{max}|)$ and equal to
-$2^M-1$, where $M$ is a non-negative integer. $b_{min}$ is zero if
-$e_{min}$ is non-negative and $-(b_{max}+K)$ otherwise. The size of the
+or sign-magnitude representation. $b_\mathit{max}$ is the smallest value
+greater than or equal to $max(|e_\mathit{min}| - K, |e_\mathit{max}|)$ and equal to
+$2^M-1$, where $M$ is a non-negative integer. $b_\mathit{min}$ is zero if
+$e_\mathit{min}$ is non-negative and $-(b_\mathit{max}+K)$ otherwise. The size of the
 smallest bit-field large enough to hold all the values of the
-enumeration type is $max(M,1)$ if $b_{min}$ is zero and $M+1$ otherwise.
+enumeration type is $max(M,1)$ if $b_\mathit{min}$ is zero and $M+1$ otherwise.
 It is possible to define an enumeration that has values not defined by
 any of its enumerators. If the \grammarterm{enumerator-list} is empty, the
 values of the enumeration are as if the enumeration had a single enumerator with