mutable decl syntax change

examples/programs/break_continue/main.bro

@@ -7,8 +7,8 @@
 
 main func() i32 {
 	# 1. `break` out of a `while` once i reaches 5.
-	i i32 = 0
-	a i32 = 0
+	i i32 := 0
+	a i32 := 0
 	while i < 100 : i += 1 {
 		if (i == 5) break
 		a += 1
@@ -16,7 +16,7 @@ main func() i32 {
 	if (a != 5) return 101
 
 	# 2. `continue` past n == 3 while summing 0..9 (45 - 3 = 42).
-	b i32 = 0
+	b i32 := 0
 	for 0..10 |n| {
 		if (n == 3) continue
 		b = b + n
@@ -25,7 +25,7 @@ main func() i32 {
 
 	# 3. Nested loops: the inner `break` exits only the inner loop, so the outer
 	#    loop still runs all three iterations (each contributing one y == 0 pass).
-	c i32 = 0
+	c i32 := 0
 	for 0..3 |x| {
 		for 0..3 |y| {
 			if (y == 1) break
@@ -38,7 +38,7 @@ main func() i32 {
 	# 4. `continue` on the final element of an inclusive range bounded by the
 	#    element type's maximum must exit cleanly, not overflow the increment.
 	hi u8 :: 255
-	d i32 = 0
+	d i32 := 0
 	for 0..=hi |v| {
 		if (v == 255) continue
 		d += 1
@@ -47,7 +47,7 @@ main func() i32 {
 
 	# 5. `while true` is exitable via `break` (so it is not an infinite loop and
 	#    the code after it is reachable).
-	e i32 = 0
+	e i32 := 0
 	while true {
 		e += 1
 		if (e == 7) break