Add more specs for method calls with a space

language/method_spec.rb

@@ -1193,14 +1193,42 @@ def n(value, &block)
     end
   end
 
-  context "when a single argument provided" do
-    it "assigns it" do
+  context "when a single argument is provided" do
+    it "assigns a simple expression" do
+      args = m (1)
+      args.should == [1]
+    end
+
+    it "assigns an expression consisting of multiple statements" do
+      args = m ((0; 1))
+      args.should == [1]
+    end
+
+    it "assigns one single statement, without the need of parentheses" do
       args = m (1 == 1 ? true : false)
       args.should == [true]
     end
+
+    it "raises a syntax error if there are multiple statements" do
+      -> {
+        eval("m (1; 2)")
+      }.should raise_error(SyntaxError)
+    end
+  end
+
+  context "when multiple arguments are provided" do
+    it "assigns simple expressions" do
+      args = m (1), (2)
+      args.should == [1, 2]
+    end
+
+    it "assigns expressions consisting of multiple statements" do
+      args = m ((0; 1)), ((2; 3))
+      args.should == [1, 3]
+    end
   end
 
-  context "when 2+ arguments provided" do
+  context "when the argument looks like an argument list" do
     it "raises a syntax error" do
       -> {
         eval("m (1, 2)")