fix: inline latex math display in pdfs generated from ipynb

app/views/layouts/application.pdf.erbtex

@@ -13,7 +13,7 @@
     \input|"python3 jupynotex.py #2 #1"
 }
 
-\usepackage[fencedCode,hashEnumerators]{markdown}
+\usepackage[fencedCode,hashEnumerators,pipeTables,texMathDollars]{markdown}
 
 \usepackage{luatextra}
 \defaultfontfeatures{Ligatures=TeX}

test/models/task_test.rb

@@ -1,4 +1,5 @@
 require 'test_helper'
+require 'pdf-reader'
 
 #
 # Contains tests for Task model objects - not accessed via API
@@ -357,6 +358,10 @@ def test_ipynb_to_pdf
     assert File.exist? path
     assert File.exist? task.final_pdf_path
 
+    # Test if latex math was rendered properly
+    reader = PDF::Reader.new(task.final_pdf_path)
+    assert reader.pages[3].text.include? "bmi =     weigh2\n                                           height"
+
     td.destroy
     assert_not File.exist? path
     unit.destroy!

test_files/submissions/vectorial_graph.ipynb

@@ -937,6 +937,20 @@
    "source": [
     "Testing a raw cell with $10 invalid latex code"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Testing inline latex math display"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Formula for calculating BMI: $\\text{bmi}=\\frac{\\text{weight}}{\\text{height}^2}$"
+   ]
   }
  ],
  "metadata": {