Improve indent queries for python in specific cases (#5332)

where the tree-sitter completely fails to parse incomplete code.

runtime/queries/python/indents.scm

@@ -29,6 +29,19 @@
   (class_definition)
 ] @indent
 
+; Workaround for the tree-sitter grammar creating large errors when a
+; try_statement is missing the except/finally clause
+(ERROR
+  "try"
+  .
+  ":" @indent @extend)
+(ERROR
+  .
+  "def") @indent @extend
+(ERROR
+  (block) @indent @extend
+  (#set! "scope" "all"))
+
 [
   (if_statement)
   (for_statement)