⚗️ improve titles

Author: agombert

docs/chapter6/Session_6_1_BERTopic_Topic_Modeling.ipynb

@@ -51,7 +51,7 @@
         "\n",
         "--- \n",
         "\n",
-        "## 1️⃣ Load the BBC News Dataset\n",
+        "## 💾 Load the BBC News Dataset\n",
         "\n",
         "We’ll start by loading the **BBC News** dataset using the Hugging Face `datasets` library.\n",
         "\n",
@@ -64,7 +64,7 @@
         "\n",
         "Each article is represented as a short paragraph of text, and labeled with its corresponding topic. While we won’t use the labels for **unsupervised topic modeling**, they are useful later for evaluation and visualization.\n",
         "\n",
-        "Let’s load the data and preview a few examples. We will concatenate the test and train sets to have a larger dataset to play with.\n"
+        "Let’s load the data and preview a few examples. We will concatenate the test\n"
       ]
     },
     {
@@ -182,7 +182,7 @@
       "cell_type": "markdown",
       "metadata": {},
       "source": [
-        "## 2️⃣ Quick Intro to BERTopic + LiteLLM\n",
+        "## ℹ️ Quick Intro to BERTopic + LiteLLM\n",
         "\n",
         "Now let’s briefly introduce the key tools we’ll use to extract and **interpret** topics:\n",
         "\n",
@@ -303,7 +303,7 @@
       "cell_type": "markdown",
       "metadata": {},
       "source": [
-        "## 3️⃣ Fit BERTopic and Explore Topics\n",
+        "## 💬 Fit BERTopic and Explore Topics\n",
         "\n",
         "Now let’s apply BERTopic to our dataset.\n",
         "\n",
@@ -372,7 +372,7 @@
       "cell_type": "markdown",
       "metadata": {},
       "source": [
-        "## 📊 4️⃣ Visualize Topic Clusters with LLM-Generated Titles\n",
+        "## 📊 Visualize Topic Clusters with LLM-Generated Titles\n",
         "\n",
         "After fitting our BERTopic model on the corpus, the next step is to explore the **semantic structure** of our dataset by visualizing:\n",
         "\n",
@@ -6109,7 +6109,7 @@
       "cell_type": "markdown",
       "metadata": {},
       "source": [
-        "## 📋 5️⃣ Topic Summary Table & Exploration\n",
+        "## 📋 Topic Summary Table & Exploration\n",
         "\n",
         "Let’s now inspect what each topic is about.\n",
         "\n",
@@ -6861,7 +6861,7 @@
         "\n",
         "---\n",
         "\n",
-        "## 🔍 6️⃣ Step-by-Step Breakdown: How BERTopic Works\n",
+        "## 🔍 Step-by-Step Breakdown: How BERTopic Works\n",
         "\n",
         "In the first half of this notebook, we focused on using BERTopic like a black box. Now it’s time to **open that box** and understand how it really works.\n",
         "\n",