[temp.expl.spec] Use normal spacing after "etc." within a sentence

Author: jwakely

source/templates.tex

@@ -6445,7 +6445,7 @@
 The definition of an explicitly specialized class is unrelated to the
 definition of a generated specialization.
 That is, its members need
-not have the same names, types, etc. as the members of a generated
+not have the same names, types, etc.\ as the members of a generated
 specialization.
 Members of an explicitly specialized
 class template are defined in the same manner as members of normal classes, and