[6.1][Diagnostics] Support "swift" style diagnostics at EOF #77781
+38
−8
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Cherry-pick #77755 into
release/6.1
Explanation: In the new diagnostic printing style, diagnostics at EOF were mistakenly ignored. This change fix that by adjusting the position checking logic, and also make sure it emits the diagnostics at the correct position.
Scope: Diagnostics
Risk: Low. The change is simple enough
Testing: Added a regression test case
Issues: rdar://129883075 rdar://138426038
Reviewers: Doug Gregor (@DougGregor), Hamish Knight (@hamishknight), and Alex Hoppen (@ahoppen)