Do not create single line conditional if conditional is a single line conditional

Author: DRBragg

lib/syntax_tree/node.rb

@@ -4680,6 +4680,11 @@ def format(q)
         return
       end
 
+      if contains_conditional?
+        format_break(q, force: true)
+        return
+      end
+
       if node.consequent || node.statements.empty?
         q.group { format_break(q, force: true) }
       else
@@ -4716,6 +4721,11 @@ def format_break(q, force:)
       q.breakable(force: force)
       q.text("end")
     end
+
+    def contains_conditional?
+      node.statements.body.length == 1 &&
+      [If, IfMod, IfOp, Unless, UnlessMod].include?(node.statements.body.first.class)
+    end
   end
 
   # If represents the first clause in an +if+ chain.

test/fixtures/if.rb

@@ -28,3 +28,7 @@
 if (foo += 1)
   foo
 end
+%
+if foo
+  a ? b : c
+end

test/fixtures/unless.rb

@@ -28,3 +28,7 @@
 unless (foo += 1)
   foo
 end
+%
+unless foo
+  a ? b : c
+end