Almost fix function overloading. Return var issues.

test/semant/unknown_overload.golden

@@ -1,16 +1,4 @@
-test/unknown_overload.shd:6,0: error: Procedure call did not match any of the possible overloads for 'foo'
-    found:
-        foo(v, v);
-        ^^^
-
-    While matching argument 1 in function call.
-        foo(v, v);
-            ^
-    Possible overloads:
-        foo :: (v1 : float3, v2 : float3) { (test/unknown_overload.shd:1)
-        foo :: (v1 : float2, v2 : float2, v3 : float2) { (test/unknown_overload.shd:2)
-
-test/unknown_overload.shd:6,4: error: Type mismatch. Expected float3 got float
+test/unknown_overload.shd:6,4: error: Type mismatch. Expected float3 got float
     found:
         foo(v, v);
             ^
@@ -30,4 +18,16 @@
     got:
         v : float = 2.0
 
+test/unknown_overload.shd:6,0: error: Procedure call did not match any of the possible overloads for 'foo'
+    found:
+        foo(v, v);
+        ^^^
+
+    While matching argument 1 in function call.
+        foo(v, v);
+            ^
+    Possible overloads:
+        foo :: (v1 : float3, v2 : float3) { (test/unknown_overload.shd:1)
+        foo :: (v1 : float2, v2 : float2, v3 : float2) { (test/unknown_overload.shd:2)
+
 

test/semant/wrong_multiply.golden

@@ -6,6 +6,6 @@
         float
 
     got:
-        res : float2 = float2(2.0, 2.0)
+        res : float2 = float2(2.0, 2.0);
 
 

test/semant/wrong_type_for_function.golden

@@ -1,4 +1,14 @@
-test/wrong_type_for_function.shd:11,17: error: Procedure call did not match any of the possible overloads for 'float4'
+test/wrong_type_for_function.shd:11,24: error: Type mismatch. Expected float got float2
+    found:
+        color : float4 = float4(y, 1.0, 1.0, 1.0);
+                                ^
+    expected:
+        float
+
+    got:
+        y : float2 = foo()
+
+test/wrong_type_for_function.shd:11,17: error: Procedure call did not match any of the possible overloads for 'float4'
     found:
         color : float4 = float4(y, 1.0, 1.0, 1.0);
                          ^^^^^^
@@ -9,14 +19,4 @@
     Possible overloads:
         foreign float4 :: (float, float, float, float) -> float4; (test/wrong_type_for_function.shd:79)
 
-test/wrong_type_for_function.shd:11,24: error: Type mismatch. Expected float got float2
-    found:
-        color : float4 = float4(y, 1.0, 1.0, 1.0);
-                                ^
-    expected:
-        float
-
-    got:
-        y : float2 = foo()
-