Issue 3882: Inhibit more DMD warnings
Add more local imports
Merge pull request #2002 from 9rnsr/fix_imports

Add more local imports
Mark std.stdio.File.close as @trusted
Merge pull request #1991 from nordlow/warn-unused-returns

Issue 3882: Inhibit more DMD warnings
Merge pull request #2003 from tom-tan/trusted-std-stdio-File-close

Mark std.stdio.File.close as @trusted