conditionally unwrapping while loops

compiler/ast/ast.odin

@@ -202,13 +202,12 @@ Stmt :: struct {
 	assignment_op: Assignment_Op,
 	target:     Expr_Id,
 	expr:       Expr_Id,
-	// `If` statements use `expr` as the condition, `captures` as optional
-	// unwrap binding names, `guard` as the optional post-unwrap boolean
-	// condition, `body` as the then-block, and `else_body` as the else-block.
-	// An `else if` chain is represented as an `else_body` holding a single
-	// nested `If` statement.
-	// `While` statements use `expr` as the condition, `body` as the loop body,
-	// and `update` as the optional post-iteration statement.
+	// `If` and `While` statements use `expr` as the condition, `captures` as
+	// optional unwrap binding names, and `guard` as the optional post-unwrap
+	// boolean condition. `If` uses `body` as the then-block and `else_body` as
+	// the else-block; an `else if` chain is represented as an `else_body`
+	// holding a single nested `If` statement. `While` uses `body` as the loop
+	// body and `update` as the optional post-iteration statement.
 	// `For` statements use `expr` as the iterable, `name` as the item capture,
 	// `index_name` as the optional index capture, and `pointer_capture` to
 	// distinguish `|@item|` from copy capture.