Corrected some comments. Fixed duplicate MathML test.

tfpf · tfpf · commit e3b1ec4f0ba1 · 2022-07-10T14:09:12.000+05:30
diff --git a/lib/matplotlib/_mathtext.py b/lib/matplotlib/_mathtext.py
@@ -757,18 +757,19 @@ class FontConstantsBase:
     # Percentage of x-height the numerator is shifted up in display style.
     num1 = 1.4
 
-    # Percentage of x-height the numerator is shifted up in text style if there
-    # is a fraction line.
+    # Percentage of x-height the numerator is shifted up in text, script and
+    # scriptscript styles if there is a fraction line.
     num2 = 1.5
 
-    # Percentage of x-height the numerator is shifted up in text style if there
-    # is no fraction line.
+    # Percentage of x-height the numerator is shifted up in text, script and
+    # scriptscript styles if there is no fraction line.
     num3 = 1.3
 
     # Percentage of x-height the denominator is shifted down in display style.
     denom1 = 1.3
 
-    # Percentage of x-height the denominator is shifted down in text style.
+    # Percentage of x-height the denominator is shifted down in text, script
+    # and scriptscript styles.
     denom2 = 1.1
 
 
@@ -2396,7 +2397,7 @@ def _genfrac(self, ldelim, rdelim, rule, style, num, den):
         cnum.hpack(width, 'exactly')
         cden.hpack(width, 'exactly')
 
-        # Align the fraction without a fraction line (node743, node744 and
+        # Align the fraction with a fraction line (node743, node744 and
         # node746).
         if rule:
             if style is self._MathStyle.DISPLAYSTYLE:
diff --git a/lib/matplotlib/tests/test_mathtext.py b/lib/matplotlib/tests/test_mathtext.py
@@ -127,14 +127,14 @@
     r'$\mathcal{H} = \int d \tau \left(\epsilon E^2 + \mu H^2\right)$',
 
     # The examples prefixed by 'mmltt' are from the MathML torture test here:
-    # https://developer.mozilla.org/en-US/docs/Mozilla/MathML_Project/MathML_Torture_Test
+    # https://www-archive.mozilla.org/projects/mathml/demo/texvsmml.xhtml
     r'${x}^{2}{y}^{2}$',
     r'${}_{2}F_{3}$',
     r'$\frac{x+{y}^{2}}{k+1}$',
     r'$x+{y}^{\frac{2}{k+1}}$',
     r'$\frac{a}{b/2}$',
     r'${a}_{0}+\frac{1}{{a}_{1}+\frac{1}{{a}_{2}+\frac{1}{{a}_{3}+\frac{1}{{a}_{4}}}}}$',
-    r'${a}_{0}+\frac{1}{{a}_{1}+\frac{1}{{a}_{2}+\frac{1}{{a}_{3}+\frac{1}{{a}_{4}}}}}$',
+    r'${a}_{0}+\dfrac{1}{{a}_{1}+\dfrac{1}{{a}_{2}+\dfrac{1}{{a}_{3}+\dfrac{1}{{a}_{4}}}}}$',
     r'$\binom{n}{k/2}$',
     r'$\binom{p}{2}{x}^{2}{y}^{p-2}-\frac{1}{1-x}\frac{1}{1-{x}^{2}}$',
     r'${x}^{2y}$',
