BigInt const (Fixes 11148 and parts of 11188)
Fix error inpull 1679
More fixes for pull 1679
Fixed wrong placement of unittest in pull 1679
Fixed template constraints in biguintcore.
More fixes.
Workaround Issue 11497 - lambda in "static if"/"assert" prevent inlining of function
std.algorithm: Document sort's predicate expectations
Fixes splitter!pred and splitter(string)
Fix remaining splitter issues
more splitter unittests
Correct english in documentation
fix Issue 11112 - Unable to execute shell commands in different threads

- the environPtr initializer was only called for the main thread
fix appenderNewCapacity for curLen == 0, start with minimum of 8.
Merge pull request #1695 from rainers/issue_11528

fix issue 11528: crashes or undefined behaviour of appender's first allocation
Fixup for issue 11532
Merge pull request #1698 from yebblies/issue11532

[trivial] Fixup for issue 11532
Merge pull request #1502 from monarchdodra/splitterPred

Fix splitter!pred and splitter(string)
Merge pull request #1688 from monarchdodra/workaround11497

Workaround Issue 11497 - lambda in "static if"/"assert" prevent inlining of functio
Merge pull request #1696 from dawgfoto/fix11112

fix Issue 11112 - Unable to execute shell commands in different threads