Disallow conditionals with not without parentheses in the predicate from turning into a ternary.

Author: kddnewton

CHANGELOG.md

@@ -13,6 +13,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 ### Changed
 
 - Correct the pattern for checking if a dynamic symbol can be converted into a label as a hash key.
+- Disallow conditionals with `not` without parentheses in the predicate from turning into a ternary.
 
 ## [2.4.1] - 2022-05-10
 

lib/syntax_tree/node.rb

@@ -5115,7 +5115,9 @@ def call(q, node)
         else
           # Otherwise, we're going to check the conditional for certain cases.
           case node
-          in predicate: Assign | Command | CommandCall | MAssign | Not | OpAssign
+          in predicate: Assign | Command | CommandCall | MAssign | OpAssign
+            false
+          in predicate: Not[parentheses: false]
             false
           in {
                statements: { body: [truthy] },

test/fixtures/if.rb

@@ -41,3 +41,11 @@
 else
   c
 end
+%
+if not(a)
+  b
+else
+  c
+end
+-
+not(a) ? b : c