Make the references to features in the help more consistent. (Sylvain Hitier)
diff --git a/runtime/doc/index.txt b/runtime/doc/index.txt
index c2fa1d9..74119a6 100644
--- a/runtime/doc/index.txt
+++ b/runtime/doc/index.txt
@@ -102,7 +102,7 @@
 |i_CTRL-^|	CTRL-^		toggle use of |:lmap| mappings
 |i_CTRL-_|	CTRL-_		When 'allowrevins' set: change language
 				(Hebrew, Farsi) {only when compiled with
-				+rightleft feature}
+				the |+rightleft| feature}
 
 		<Space> to '~'	not used, except '0' and '^' followed by
 				CTRL-D
@@ -163,7 +163,7 @@
 |i_CTRL-X_CTRL-V|	CTRL-X CTRL-V	complete like in : command line
 |i_CTRL-X_CTRL-]|	CTRL-X CTRL-]	complete tags
 |i_CTRL-X_s|		CTRL-X s	spelling suggestions
-{not available when compiled without the +insert_expand feature}
+{not available when compiled without the |+insert_expand| feature}
 
 ==============================================================================
 2. Normal mode						*normal-index*