Suppress ddoc highlighting of every occurrence of "memory" in the text.
Merge pull request #1011 from quickfur/core_memory_ddoc

[ddoc] Suppress ddoc highlighting of every occurrence of "memory" in the text.
Fix issue 13748 -- benchmark druntime/benchmark/aabench/string.d fails
Merge pull request #1025 from schveiguy/fix13748

Fix issue 13748 -- benchmark druntime/benchmark/aabench/string.d fails
GC: precalculate shiftBy
Merge pull request #1027 from rainers/precalc_shiftBy

Optimize GC: precalculate shiftBy
fix for issue 13701, improve AA.dup for const values