an awful typo in std.regex; fix issue 9512
DDoc clarification: std.process.shell throws ErrnoException.
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
Merge pull request #1150 from kiith-sa/patch-1

DDoc clarification: std.process.shell throws ErrnoException.