Add blank lines to make the output somewhat prettier

Add blank lines between functions, between functions and states, between variables and functions or states, between states, and between events.

Or more concisely: add blank lines between events and between all elements at the global level except between variables (that actually describes the algorithm).

Some test cases expected no newlines; fix them.

testparser.py

@@ -442,8 +442,8 @@ class Test03_Optimizer(UnitTestCase):
             ''', ['extendedassignment'])
         self.opt.optimize(p)
         out = self.outscript.output(p)
-        self.assertEqual(out, 'integer a;\nx()\n{\n    {\n        '
-            'string s = "x";\n        s = s + (string)a;\n    }\n}\n'
+        self.assertEqual(out, 'integer a;\n\nx()\n{\n    {\n        '
+            'string s = "x";\n        s = s + (string)a;\n    }\n}\n\n'
             'default\n{\n    timer()\n    {\n        x();\n        a = 3;\n'
             '        llOwnerSay((string)a);\n'
             '    }\n}\n'
@@ -462,7 +462,7 @@ class Test03_Optimizer(UnitTestCase):
         self.opt.optimize(p)
         out = self.outscript.output(p)
         self.assertEqual(out, 'key k = "blah";\nlist L = [k, "xxxx", 1.];\n'
-            'float f = 0;\ninteger i;\nvector v = <f,3,4>;\n'
+            'float f = 0;\ninteger i;\nvector v = <f,3,4>;\n\n'
             'default\n{\n    timer()\n    {\n'
             '        f = 4;\n        k = "";\n        i = 0;\n'
             '        v = <((float)0), ((float)0), ((float)0)>;\n        L = [];\n'
@@ -476,7 +476,7 @@ class Test03_Optimizer(UnitTestCase):
             ['extendedglobalexpr'])
         self.opt.optimize(p)
         out = self.outscript.output(p)
-        self.assertEqual(out, 'list L;\nfloat f = 0;\n'
+        self.assertEqual(out, 'list L;\nfloat f = 0;\n\n'
             'default\n{\n    timer()\n    {\n'
             '        L = [];\n        f = 3;\n'
             '        llOwnerSay((string)(L + f));\n'