config help fixes

Config.in

@@ -411,7 +411,7 @@ config DEBUG
 	  Most people should answer N.
 
 config DEBUG_PESSIMIZE
-	bool "Disable compiler optimizations."
+	bool "Disable compiler optimizations"
 	default n
 	depends on DEBUG
 	help

loginutils/Config.in

@@ -101,7 +101,7 @@ config DELGROUP
 	  Utility for deleting a group account.
 
 config FEATURE_DEL_USER_FROM_GROUP
-	bool "Support for removing users from groups."
+	bool "Support for removing users from groups"
 	default n
 	depends on DELGROUP
 	help

shell/Config.in

@@ -69,7 +69,7 @@ config ASH_READ_NCHARS
 	  'read -s' will read without echoing the user's input.
 
 config ASH_READ_TIMEOUT
-	bool "'read -t S' support."
+	bool "'read -t S' support"
 	default n
 	depends on ASH
 	help