RFR: 8277048: Tiny improvements to the specification text for java.util.Properties.load

[Pavel Rappo]

Please review this simple two-hunk fix to the documentation comment of java.util.Properties#load(java.io.Reader). The first hunk (line/lines) is a suggestion. I believe it reads better since the plurality is more idiomatic; native English speakers should correct me if I'm wrong. The second hunk picks up what was overlooked in JDK-8274075 (https://git.openjdk.java.net/jdk/pull/5610).

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Commit messages:
 - Initial commit

Changes: https://git.openjdk.java.net/jdk/pull/6367/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6367&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8277048
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6367.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6367/head:pull/6367

PR: https://git.openjdk.java.net/jdk/pull/6367