diff --git a/docs/source/notebooks/developer_guide.ipynb b/docs/source/notebooks/developer_guide.ipynb
index 15ba30a..848ca84 100644
--- a/docs/source/notebooks/developer_guide.ipynb
+++ b/docs/source/notebooks/developer_guide.ipynb
@@ -694,9 +694,9 @@
       "    Why Focus on Top-Level Tags?\n",
       "    ============================\n",
       "    SEC filings usually have a flat HTML structure, which simplifies the\n",
-      "    parsing process.Each top-level HTML tag often directly corresponds\n",
+      "    parsing process. Each top-level HTML tag often directly corresponds\n",
       "    to a single semantic element. This is different from many websites\n",
-      "    where HTML tags are nested deeply,requiring more complex parsing.\n",
+      "    where HTML tags are nested deeply, requiring more complex parsing.\n",
       "\n",
       "    For Advanced Users:\n",
       "    ====================\n",