Mention that etags switches to C++ when meets `template'.

etc/NEWS

@@ -1419,7 +1419,8 @@ declarations when given the --declarations option.
 "operator+", without spaces between the keyword and the operator.
 
 *** You shouldn't generally need any more the -C or -c++ option: etags
-automatically detects a C++ file when it meets the `class' keyword.
+automatically switches to C++ parsing when it meets the `class' or
+`template' keywords.
 
 *** Etags now is able to delve at arbitrary deeps into nested structures in
 C-like languages.  Previously, it was limited to one or two brace levels.