Add support for syntax blocks.

examples/basic/function0001.ngr

@@ -1,5 +1,5 @@
 x = 1;
-function add_x(y) x + y
+function add_x(y) x + y;
 a = 3;
 print x;
 result = add_x(a);

examples/basic/function0002.ngr

@@ -1,5 +1,5 @@
 x = 1;
-function add_x(y) x + y
+function add_x(y) x + y;
 a = 3;
 function add_x_twice(y) add_x(y) + x
 print x;

examples/basic/function0003.ngr

@@ -0,0 +1,11 @@
+x = 1u64;
+function mean_x(y) {
+    base = x + y;
+    result = base / 2;
+    result;
+};
+a = 3;
+mean_x_and_a = mean_x(a);
+mean_x_and_9 = mean_x(9);
+print mean_x_and_a;
+print mean_x_and_9;

examples/basic/generated0001.ngr

@@ -1,3 +1,3 @@
 x = 4u64;
-function f(y) (x + y)
+function f(y) (x + y);
 print x;

examples/basic/generated0003.ngr

@@ -1,4 +1,4 @@
 n = (49u8 + 155u8);
 q = n;
-function u (b) n + b
+function u (b) n + b;
 v = n;