Property and non-property function cannot overload each other.

Today, compiler does not check it if they are just defined. It is another compiler bug, but this code is essentially illegal.
Merge pull request #1145 from 9rnsr/fix_property_overload

[trivial] Property and non-property function cannot overload each other.
an awful typo in std.regex; fix issue 9512
try to unify code style to use spaces between operators
even more spaces around operators
Merge pull request #1146 from blackwhale/typo-regex

an awful typo in std.regex; issue 9512
Fixes Issue 9457 - isSorted(string) does not work.
Japanese spell check
Fixes Issue 9339 - Uniform for enums.
Fixes Issue 9444 - Exception must be thrown on Posix when shell() call fails.
Fixes Issue 9523 - Regression: Enum to Enum conversion should work in std.conv.
Fix macro uses and posix.mak for https://github.com/D-Programming-Language/d-programming-language.org/pull/271
issue 5013
Merge remote-tracking branch 'upstream/master' into 5013