added spaces in concat output, added numeric concat test

Author: acureau

luaparser/printers.py

@@ -539,7 +539,7 @@ def visit(self, node: OrLoOp) -> str:
 
     @visit.register
     def visit(self, node: Concat) -> str:
-        return self.do_visit(node.left) + ".." + self.do_visit(node.right)
+        return self.do_visit(node.left) + " .. " + self.do_visit(node.right)
 
     @visit.register
     def visit(self, node: UMinusOp) -> str:

luaparser/tests/test_expressions.py

@@ -359,8 +359,8 @@ def test_logic_not(self):
     """ 3.4.6 – Concatenation                                                   """
     """ ----------------------------------------------------------------------- """
 
-    def test_concatenation(self):
-        tree = ast.parse(r'str = "begin".."end"')
+    def test_string_concatenation(self):
+        tree = ast.parse(r'str = "begin" .. "end"')
         exp = Chunk(
             Block(
                 [
@@ -378,6 +378,25 @@ def test_concatenation(self):
         )
         self.assertEqual(exp, tree)
 
+    def test_number_concatenation(self):
+        tree = ast.parse(r'str = 1 .. 2')
+        exp = Chunk(
+            Block(
+                [
+                    Assign(
+                        targets=[Name("str")],
+                        values=[
+                            Concat(
+                                left=Number(1),
+                                right=Number(2),
+                            )
+                        ],
+                    )
+                ]
+            )
+        )
+        self.assertEqual(exp, tree)
+
     """ ----------------------------------------------------------------------- """
     """ 3.4.7 – The Length Operator                                             """
     """ ----------------------------------------------------------------------- """