Narrow scope of special-case for unqualified printing of names in core libraries

Commit 547c597112954353cef7157cb0a389bc4f6303eb modifies the
pretty-printer to render names from a set of core packages (`base`,
`ghc-prim`, `template-haskell`) as unqualified. The idea here was that
many of these names typically are not in scope but are well-known by the
user and therefore qualification merely introduces noise.

This, however, is a very large hammer and potentially breaks any
consumer who relies on parsing GHC output (hence #11208). This commit
partially reverts this change, now only printing `Constraint` (which
appears quite often in errors) as unqualified.

Fixes #11208.

Updates tests in `array` submodule.

Test Plan: validate

Reviewers: hvr, thomie, austin

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D1619

GHC Trac Issues: #11208

1 files changed, 5 insertions, 5 deletions

diff --git a/testsuite/tests/ghci/scripts/ghci019.stderr b/testsuite/tests/ghci/scripts/ghci019.stderr
index 10f6a54bfe..aedf854e8a 100644
--- a/testsuite/tests/ghci/scripts/ghci019.stderr
+++ b/testsuite/tests/ghci/scripts/ghci019.stderr
@@ -1,5 +1,5 @@
-

-ghci019.hs:9:10: Warning:

-    No explicit implementation for

-      either ‘==’ or ‘/=’

-    In the instance declaration for ‘Eq Foo’

+
+ghci019.hs:9:10: warning:
+    • No explicit implementation for
+        either ‘Prelude.==’ or ‘Prelude./=’
+    • In the instance declaration for ‘Prelude.Eq Foo’