Correct erroneous comment in ExpressionDecomposer.
@@ -941,7 +941,7 @@ class ExpressionDecomposer {
* <ul>
* <li>{@code expressionRoot} = `a = 1 + x();`
* <li>{@code subExpression} = `x()`, has side-effects
- * <li>{@code MOVABLE} because the final value of `a` can not be influenced by `x()`.
+ * <li>{@code MOVABLE} because the final value of `1` can not be influenced by `x()`.
* </ul>
* <ul>
* <li>{@code expressionRoot} = `a = b + x();`
