RFR: 8261940: Fix references to IOException in BigDecimal javadoc

[Alan Bateman]

On Thu, 18 Feb 2021 06:03:41 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> Noticed by some of  Jon Gibbons's doc linting & checking tooling, this changeset fixes two javadoc issues for BigDecimal's serialization-related methods, improving the serial form page.

Looks okay but it might be simpler to just import java.io.IOException and avoid having two usages of the fully qualified name in the source file.

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Marked as reviewed by alanb (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/2623