Update tests.

test/libsolidity/syntaxTests/immutable/ctor_initialization_reading.sol

@@ -1,8 +1,8 @@
 contract C {
     uint immutable x;
-    constructor() public {
+    constructor() {
         x = 3 + x;
     }
 }
 // ----
-// TypeError 7733: (78-79): Immutable variables cannot be read during contract creation time, which means they cannot be read in the constructor or any function or modifier called from it.
+// TypeError 7733: (71-72): Immutable variables cannot be read during contract creation time, which means they cannot be read in the constructor or any function or modifier called from it.