style: allow license exceptions to be on one line

Library/Homebrew/rubocops/lines.rb

@@ -305,16 +305,20 @@ module RuboCop
         def audit_formula(_node, _class_node, _parent_class_node, body_node)
           license_node = find_node_method_by_name(body_node, :license)
           return unless license_node
+          return if license_node.source.include?("\n")
 
-          license = parameters(license_node).first
-          return unless license.hash_type?
-          return unless license.each_descendant(:hash).count.positive?
-          return if license.source.include?("\n")
+          parameters(license_node).first.each_descendant(:hash).each do |license_hash|
+            next if license_exception? license_hash
 
             problem "Split nested license declarations onto multiple lines"
           end
         end
 
+        def_node_matcher :license_exception?, <<~EOS
+          (hash (pair (sym :with) str))
+        EOS
+      end
+
       # This cop checks for other miscellaneous style violations.
       #
       # @api private

Library/Homebrew/test/rubocops/lines_spec.rb

@@ -681,6 +681,16 @@ describe RuboCop::Cop::FormulaAudit::Licenses do
       RUBY
     end
 
+    it "allow license exceptions" do
+      expect_no_offenses(<<~RUBY)
+        class Foo < Formula
+          desc "foo"
+          url 'https://brew.sh/foo-1.0.tgz'
+          license "MIT" => { with: "LLVM-exception" }
+        end
+      RUBY
+    end
+
     it "allow multiline nested license hashes" do
       expect_no_offenses(<<~RUBY)
         class Foo < Formula
@@ -694,6 +704,20 @@ describe RuboCop::Cop::FormulaAudit::Licenses do
       RUBY
     end
 
+    it "allow multiline nested license hashes with exceptions" do
+      expect_no_offenses(<<~RUBY)
+        class Foo < Formula
+          desc "foo"
+          url 'https://brew.sh/foo-1.0.tgz'
+          license any_of: [
+            "MIT",
+            all_of: ["0BSD", "Zlib"],
+            "GPL-2.0-only" => { with: "LLVM-exception" },
+          ]
+        end
+      RUBY
+    end
+
     it "require multiple lines for nested license hashes" do
       expect_offense(<<~RUBY)
         class Foo < Formula