fix PR

src/extensions/base/BaseSchema/BaseSchemaSpecs/index.ts

@@ -64,6 +64,10 @@ export const BaseSchemaSpecs: ExtensionAuto<BaseSchemaSpecsOptions> = (builder,
             },
             fromMd: {tokenSpec: {name: BaseNode.Paragraph, type: 'block'}},
             toMd: (state, node, parent) => {
+                /*
+                    An empty line is added only if there is some content in the parent element. 
+                    This is necessary in order to prevent an empty document with empty lines
+                */
                 if (opts.preserveEmptyRows && !node.content.size) {
                     let isParentEmpty = true;