Disallow turning a conditional into a ternary if there's a Not node without parentheses in the predicate

Author: bbuchalter

lib/syntax_tree/node.rb

@@ -5192,7 +5192,7 @@ def call(q, node)
         else
           # Otherwise, we're going to check the conditional for certain cases.
           case node
-          in predicate: Assign | Command | CommandCall | MAssign | OpAssign
+          in predicate: Assign | Command | CommandCall | MAssign | Not | OpAssign
             false
           in {
                statements: { body: [truthy] },