RFR: JDK-8269843: typo in LinkedHashMap::removeEldestEntry spec

[Tingjun Yuan]

Fix a typo in the specification of `java.util.LinkedHashMap.removeEldestEntry(Map.Entry)`.

> This is the entry that will be removed **it** this method returns `true`.

will become:

> This is the entry that will be removed **if** this method returns `true`.

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Commit messages:
 - Fix typo in LinkedHashMap.java

Changes: https://git.openjdk.org/jdk/pull/13367/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13367&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8269843
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/13367.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13367/head:pull/13367

PR: https://git.openjdk.org/jdk/pull/13367