Fix typos 'followings' 'optionanl' (#16549)

diff --git a/configure.py b/configure.py
index 16763b8..27519b4 100644
--- a/configure.py
+++ b/configure.py
@@ -298,7 +298,7 @@
       System".
     enabled_by_default: boolean for default behavior.
     question: optional string for how to ask for user input.
-    yes_reply: optionanl string for reply when feature is enabled.
+    yes_reply: optional string for reply when feature is enabled.
     no_reply: optional string for reply when feature is disabled.
 
   Returns:
@@ -411,7 +411,7 @@
       System".
     enabled_by_default: boolean for default behavior.
     question: optional string for how to ask for user input.
-    yes_reply: optionanl string for reply when feature is enabled.
+    yes_reply: optional string for reply when feature is enabled.
     no_reply: optional string for reply when feature is disabled.
   """
   var = int(