fix tests, rename

Author: kim-em

tests/lean/run/grind_premises.lean tests/lean/run/grind_suggestions.leantests/lean/run/grind_premises.lean renamed to tests/lean/run/grind_suggestions.lean

@@ -1,7 +1,7 @@
 import Lean.LibrarySuggestions.Basic
 
 /--
-error: No premise selector registered. (Note that Lean does not provide a default premise selector, these must be provided by a downstream library, and configured using `set_premise_selector`.)
+error: No library suggestions engine registered. (Note that Lean does not provide a default library suggestions engine, these must be provided by a downstream library, and configured using `set_library_suggestions`.)
 -/
 #guard_msgs in
 example : True := by

tests/lean/run/premise_selection.lean tests/lean/run/library_suggestions.leantests/lean/run/premise_selection.lean renamed to tests/lean/run/library_suggestions.lean

@@ -15,7 +15,7 @@ error: Failed to elaborate Nat as a `MVarId → Config → MetaM (Array Suggesti
 set_library_suggestions Nat
 
 /--
-error: No premise selector registered. (Note that Lean does not provide a default premise selector, these must be provided by a downstream library, and configured using `set_library_suggestions`.)
+error: No library suggestions engine registered. (Note that Lean does not provide a default library suggestions engine, these must be provided by a downstream library, and configured using `set_library_suggestions`.)
 -/
 #guard_msgs in
 example : True := by