message: Some minor cleanup/clarification.
diff: @@ -121,12 +121,12 @@ class RewriteNamespaceExportsPass {
  correctedNamespaceName = 'Polymer';
  name = 'Polymer';
  }
  - replacePreservingComments(
  - nodePath,
  - jsc.exportNamedDeclaration(jsc.variableDeclaration(
  - this.mutableNames.has(correctedNamespaceName) ? 'let' : 'const',
  - [jsc.variableDeclarator(
  - jsc.identifier(name), exportedExpression)])));
  + const variableKind =
  + this.mutableNames.has(correctedNamespaceName) ? 'let' : 'const';
  + const newExportNode = jsc.exportNamedDeclaration(jsc.variableDeclaration(
  + variableKind,
  + [jsc.variableDeclarator(jsc.identifier(name), exportedExpression)]));
  + replacePreservingComments(nodePath, newExportNode);
  this.exportMigrationRecords.push(
  {oldNamespacedName: correctedNamespaceName, es6ExportName: name});
  }
  