RFR: 8279918: Fix various doc typos [v2]

[Pavel Rappo]

> - Most of the typos are of a trivial kind: missing whitespace.
> - If any of the typos should be fixed in the upstream projects instead, please say so; I will drop those typos from the patch.
> - As I understand it, ` ` in ImageInputStream and DataInput is an irrelevant formatting artefact and thus can be removed.
> - `'` is an apostrophe, which does not require to be encoded.

Pavel Rappo has updated the pull request incrementally with one additional commit since the last revision:

  Additional typos

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7063/files
  - new: https://git.openjdk.java.net/jdk/pull/7063/files/fe81eeca..b256a13f

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7063&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7063&range=00-01

  Stats: 3 lines in 2 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7063.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7063/head:pull/7063

PR: https://git.openjdk.java.net/jdk/pull/7063