Regenerate for syntax node name change

Author: DougGregor

CodeGeneration/Sources/SyntaxSupport/gyb_generated/DeclNodes.swift

@@ -1501,7 +1501,7 @@ public let DECL_NODES: [Node] = [
        ]),
 
   Node(name: "MacroExpansionDecl",
-       nameForDiagnostics: "macro expansion declaration",
+       nameForDiagnostics: "pound literal declaration",
        kind: "Decl",
        children: [
          Child(name: "PoundToken",

CodeGeneration/Sources/SyntaxSupport/gyb_generated/ExprNodes.swift

@@ -1289,7 +1289,7 @@ public let EXPR_NODES: [Node] = [
        ]),
 
   Node(name: "MacroExpansionExpr",
-       nameForDiagnostics: "macro expansion expression",
+       nameForDiagnostics: "pound literal expression",
        kind: "Expr",
        children: [
          Child(name: "PoundToken",

Sources/SwiftSyntax/gyb_generated/SyntaxEnum.swift

@@ -490,7 +490,7 @@ public enum SyntaxEnum {
     case .objcSelectorExpr:
       return "'#selector' expression"
     case .macroExpansionExpr:
-      return "macro expansion expression"
+      return "pound literal expression"
     case .postfixIfConfigExpr:
       return nil
     case .editorPlaceholderExpr:
@@ -624,7 +624,7 @@ public enum SyntaxEnum {
     case .precedenceGroupAssociativity:
       return "'associativity' property of precedencegroup"
     case .macroExpansionDecl:
-      return "macro expansion declaration"
+      return "pound literal declaration"
     case .tokenList:
       return "token list"
     case .nonEmptyTokenList: