RFR: 8264161: BigDecimal#stripTrailingZeros can throw undocumented ArithmeticException [v2]

[Joe Darcy]

> While some of the existing text in BigDecimal could be read as implying exponent overflow/underflow will throw an ArithmeticException, it is reasonable to simply state that explicitly.
> 
> The next text is meant to cover the usage of the checkScale family of methods.
> 
> I'll reflow the existing paragraph once the text is agreed to.

Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:

  Respond to review feedback.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3204/files
  - new: https://git.openjdk.java.net/jdk/pull/3204/files/05ed1753..f427ba56

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3204&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3204&range=00-01

  Stats: 12 lines in 1 file changed: 0 ins; 1 del; 11 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3204.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3204/head:pull/3204

PR: https://git.openjdk.java.net/jdk/pull/3204