Github: project-level settings
Github: Nullable
Github: use BorderFactory
Github: fetch a single branch for diff

* fix TargetBranchInfo once more
Github: remove duplication
Github: Ref -> AtomicReference

* data in Ref don't have modifier 'volatile' -> we can't use it as connector between threads
@NotNull
IDEA-99638 completion in @Language("<caret>")
IDEA-52424 language injection for GStrings and binary expressions
IDEA-113299 Imports removed when writing javadoc
Allow to move a standard code style option to another group [CR-IC-2192]
(cherry picked from commit 81c4f16)