fix: A minor fix to escape an error when a user selects a wrong item …

…number.

Change-Id: I57aaaf8b71df7c950a8f0199fd4b539f81ea2528

ariel/dubbing.py

@@ -854,12 +854,15 @@ def _select_edit_number(
     """Runs edit index selection process."""
     ask_for_index = True
     while ask_for_index:
-      index = int(input("Enter item number to edit: ")) - 1
-      if not 0 <= index < len(utterance_metadata):
-        print("Invalid item number.")
-      else:
-        ask_for_index = False
-        return index
+      try:
+        index = int(input("Enter item number to edit: ")) - 1
+        if not 0 <= index < len(utterance_metadata):
+          print("Invalid item number.")
+        else:
+          ask_for_index = False
+          return index
+      except ValueError:
+        print("Invalid input format. Please try again.")
 
   def _edit_utterance_metadata(
       self,