Fix duplicate index entries for 'base class'. (#1165)

See also #1064.

Author: jensmaurer

source/overloading.tex

@@ -307,7 +307,7 @@
 \rSec1[over.dcl]{Declaration matching}%
 \indextext{overloading!declaration matching}%
 \indextext{scope!overloading and}%
-\indextext{base class!overloading and}
+\indextext{base~class!overloading and}
 
 \pnum
 Two function declarations of the same name refer to the same function if they

source/templates.tex

@@ -3822,7 +3822,7 @@
 \end{example}
 
 \pnum
-\indextext{base class!dependent}%
+\indextext{base~class!dependent}%
 A \term{dependent base class} is a base class that is a dependent type and is
 not the current instantiation.
 \begin{note}