[style] detab runnable/template4.d
fix Issue 12725 - IFTI should consider instantiated types with dependent template parameters
fix Issue 7469 - template mangling depends on instantiation order
Merge pull request #3536 from 9rnsr/fix7469

Issue 7469 - template mangling depends on instantiation order
fix Issue 12719 - struct.c:705: virtual void StructDeclaration::semantic(Scope*): Assertion `parent && parent == sc->parent' failed.

Set `semanticRun` to `PASSsemanticdone;` immediately after the struct size determined.