Update tests

Author: DougGregor

Tests/SwiftParserTest/DeclarationTests.swift

@@ -745,8 +745,8 @@ final class DeclarationTests: XCTestCase {
       diagnostics: [
         DiagnosticSpec(locationMarker: "1️⃣", message: "expected 'func' in function"),
         DiagnosticSpec(locationMarker: "2️⃣", message: "expected parameter clause in function signature"),
-        DiagnosticSpec(locationMarker: "3️⃣", message: "expected identifier in pound literal declaration"),
-        DiagnosticSpec(locationMarker: "4️⃣", message: "expected identifier in pound literal declaration"),
+        DiagnosticSpec(locationMarker: "3️⃣", message: "expected identifier in macro expansion"),
+        DiagnosticSpec(locationMarker: "4️⃣", message: "expected identifier in macro expansion"),
         DiagnosticSpec(locationMarker: "5️⃣", message: #"unexpected code '25 "line-directive.swift"' in struct"#),
       ]
     )

Tests/SwiftParserTest/ExpressionTests.swift

@@ -744,7 +744,7 @@ final class ExpressionTests: XCTestCase {
       "#keyPath((b:1️⃣)2️⃣",
       diagnostics: [
         DiagnosticSpec(locationMarker: "1️⃣", message: "expected value in tuple"),
-        DiagnosticSpec(locationMarker: "2️⃣", message: "expected ')' to end pound literal declaration"),
+        DiagnosticSpec(locationMarker: "2️⃣", message: "expected ')' to end macro expansion"),
       ]
     )
   }

Tests/SwiftParserTest/translated/MultilinePoundDiagnosticArgRdar41154797Tests.swift

@@ -22,7 +22,7 @@ final class MultilinePoundDiagnosticArgRdar41154797Tests: XCTestCase {
       """##,
       diagnostics: [
         DiagnosticSpec(message: #"expected '"""' to end string literal"#),
-        DiagnosticSpec(message: "expected ')' to end pound literal declaration"),
+        DiagnosticSpec(message: "expected ')' to end macro expansion"),
       ]
     )
   }

Tests/SwiftParserTest/translated/PoundAssertTests.swift

@@ -49,7 +49,7 @@ final class PoundAssertTests: XCTestCase {
       #assert(1️⃣, "error message")
       """#,
       diagnostics: [
-        DiagnosticSpec(message: "expected value in pound literal declaration")
+        DiagnosticSpec(message: "expected value in macro expansion")
       ]
     )
   }
@@ -63,7 +63,7 @@ final class PoundAssertTests: XCTestCase {
       """,
       diagnostics: [
         DiagnosticSpec(
-          message: "expected ')' to end pound literal declaration",
+          message: "expected ')' to end macro expansion",
           notes: [
             NoteSpec(message: "to match this opening '('")
           ]
@@ -81,7 +81,7 @@ final class PoundAssertTests: XCTestCase {
       """#,
       diagnostics: [
         DiagnosticSpec(
-          message: "expected ')' to end pound literal declaration",
+          message: "expected ')' to end macro expansion",
           notes: [
             NoteSpec(message: "to match this opening '('")
           ]