Fix Issue 12477 - std.bitmanip should emit informative diagnostics.
Fix Issue 1726 - Document FileMode in std.stream.
Fix Issue 12293 - Add forward to std.algorithm's cheat-sheet.
Merge pull request #2099 from AndrejMitrovic/Fix12293

Issue 12293 - forward is missing from std.algorithm's cheat-sheet
Merge pull request #2113 from AndrejMitrovic/Fix12477

Issue 12477 - std.bitmanip should emit informative diagnostics.
Merge pull request #2119 from AndrejMitrovic/Fix1726

Issue 1726 - Document FileMode in std.stream.
Remove DDOC comment from deprecated Complex(T).toString() with sink and format string
Removed DDOC comments from deprecated std.metastrings
Merge pull request #2134 from schuetzm/remove-std-metastrings

Remove deprecated std.metastrings
Merge pull request #2135 from schuetzm/remove-complex-tostring

Remove DDOC comment from deprecated Complex(T).toString() with sink and ...