Fix when multiple line

Author: sue445

lib/rspec/parameterized/core/composite_parser.rb

@@ -54,7 +54,7 @@ def self.parse_with_prism(filename, linenum)
             next if index < linenum - 1
             buf << line
 
-            ret = Prism.parse(buf.join("\n"))
+            ret = Prism.parse(buf.join)
             return ret if ret.success?
           end
 

spec/rspec/parameterized/core/composite_parser_spec.rb

@@ -28,6 +28,18 @@
         it { should eq '->(a) { a + "ほげほげ" }' }
         its(:encoding) { should eq Encoding::UTF_8 }
       end
+
+      context "multiple lines" do
+        let(:arg) do
+          ->(a) {
+            a +
+              1
+          }
+        end
+
+        it { should eq "->(a) {\n            a +\n              1\n          }" }
+        its(:encoding) { should eq Encoding::UTF_8 }
+      end
     end
   end
 end