do reverse of a bytecode in lookbehinds
backtracking matcher works with reversed bytecode
ditto with Thompson matcher
cleanup to keep lookahead/lookbehind more in sync for future

Fix 64 bit issues, remove useless debug hook
fix broken indention, detab
Mark std.string.inPattern as @safe and pure
Mark std.string.countchars as @safe and pure
Merge pull request #1518 from tom-tan/safe-pure-string-inPattern

Mark std.string.inPattern as @safe and pure
Merge pull request #1519 from tom-tan/safe-pure-string-countchars

Mark std.string.countchars as @safe and pure
Make std.string.removechars @safe and pure
Make std.string.removechars @safe and pure by using implicit conversion
Fix emplace
Fix spelling
Issue 9559 - Range of Nullable doesn't work with std.array.array
Tweak emplace some
emplace: diagn for quals; simplf alias this brnch
make "emplace(singleArg)" safe pure nothrow
reword emplace deprecation message
Yet another emplace unittest that is fixed
Add RefRange to ddoc overview.