MAINT: merge Markdown cells (apart from headings)

docs/amplitude-analysis.ipynb

@@ -321,13 +321,8 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "In the next steps, we use this {class}`~ampform.helicity.HelicityModel` as a template for a computational function to [generate data](compwa-step-2) and to [perform a fit](compwa-step-3)."
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
+    "In the next steps, we use this {class}`~ampform.helicity.HelicityModel` as a template for a computational function to [generate data](compwa-step-2) and to [perform a fit](compwa-step-3).\n",
+    "\n",
     ":::{tip}\n",
     "\n",
     "See more advanced examples on {doc}`AmpForm's usage page <ampform:usage>`.\n",
@@ -530,24 +525,14 @@
     "\n",
     "If {func}`.create_parametrized_function` takes a long time, have a look at {doc}`usage/faster-lambdify`.\n",
     "\n",
-    ":::"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
+    ":::\n",
+    "\n",
     ":::{seealso}\n",
     "\n",
     "{ref}`usage/basics:Hit & miss`\n",
     "\n",
-    ":::"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
+    ":::\n",
+    "\n",
     "A problem is that {class}`.ParametrizedBackendFunction` takes a {obj}`.DataSample` with kinematic variables for the helicity formalism as input, not a set of four-momenta. We therefore need to construct a {class}`.DataTransformer` to transform these four-momenta to function variables. In this case, we work with the helicity formalism, so we construct a {class}`.SympyDataTransformer`:"
    ]
   },
@@ -572,13 +557,8 @@
     "\n",
     "{ref}`usage:Generate and transform data`\n",
     "\n",
-    ":::"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
+    ":::\n",
+    "\n",
     "That's it, now we have enough info to create an intensity-based data sample. Notice how the structure of the output data is the same as the [phase-space sample we generated previously](compwa-step-2.1):"
    ]
   },
@@ -685,13 +665,8 @@
     "class: dropdown\n",
     "---\n",
     "By default, {mod}`tensorwaves` only generates invariant masses of the {class}`Topologies <qrules.topology.Topology>` that are of relevance to the decay problem. In this case, we only have resonances $f_0 \\to \\pi^0\\pi^0$. If you are interested in more invariant mass combinations, you can do so with the method {meth}`~ampform.kinematics.HelicityAdapter.register_topology`.\n",
-    "````"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
+    "````\n",
+    "\n",
     "The {obj}`.DataSample` can easily be converted to a {class}`pandas.DataFrame`:"
    ]
   },