Closes GH-6194.

* PHP-7.4:
  Enable most lstat_stat_* tests on Windows

Most of these have been skipped on Windows for no good reason (`lstat`
is available there as of PHP 4).  Several others would only fail,
because the `blksize` and `blocks` elements are always `-1` on Windows,
which can easily be fixed by using `%i` format specifiers instead of
`%d`.

Closes GH-5759

This stat property seems to be somewhat unreliable depending on the
filesystem. On Travis ARM64 CI a much larger payload is required
to get this value to increase.

This patch adds missing newlines, trims multiple redundant final
newlines into a single one, and trims redundant leading newlines in all
*.phpt sections.

According to POSIX, a line is a sequence of zero or more non-' <newline>'
characters plus a terminating '<newline>' character. [1] Files should
normally have at least one final newline character.

C89 [2] and later standards [3] mention a final newline:
"A source file that is not empty shall end in a new-line character,
which shall not be immediately preceded by a backslash character."

Although it is not mandatory for all files to have a final newline
fixed, a more consistent and homogeneous approach brings less of commit
differences issues and a better development experience in certain text
editors and IDEs.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_206
[2] https://port70.net/~nsz/c/c89/c89-draft.html#2.1.1.2
[3] https://port70.net/~nsz/c/c99/n1256.html#5.1.1.2

EXPECTF logic in run-tests.php is considerable, so let's avoid it.