Update katex to v0.16.21

paige/node_modules/katex/src/functions/font.js

@@ -33,7 +33,7 @@ defineFunction({
     type: "font",
     names: [
         // styles, except \boldsymbol defined below
-        "\\mathrm", "\\mathit", "\\mathbf", "\\mathnormal",
+        "\\mathrm", "\\mathit", "\\mathbf", "\\mathnormal", "\\mathsfit",
 
         // families
         "\\mathbb", "\\mathcal", "\\mathfrak", "\\mathscr", "\\mathsf",

paige/node_modules/katex/src/functions/rule.js

@@ -11,6 +11,8 @@ defineFunction({
     props: {
         numArgs: 2,
         numOptionalArgs: 1,
+        allowedInText: true,
+        allowedInMath: true,
         argTypes: ["size", "size", "size"],
     },
     handler({parser}, args, optArgs) {

paige/node_modules/katex/src/functions/text.js

@@ -30,9 +30,13 @@ const optionsWithFont = (group, options) => {
         return options.withTextFontFamily(textFontFamilies[font]);
     } else if (textFontWeights[font]) {
         return options.withTextFontWeight(textFontWeights[font]);
-    } else {
-        return options.withTextFontShape(textFontShapes[font]);
+    } else if (font === "\\emph") {
+        return options.fontShape === "textit" ?
+            options.withTextFontShape("textup") :
+            options.withTextFontShape("textit");
     }
+
+    return options.withTextFontShape(textFontShapes[font]);
 };
 
 defineFunction({
@@ -43,7 +47,7 @@ defineFunction({
         // Font weights
         "\\textbf", "\\textmd",
         // Font Shapes
-        "\\textit", "\\textup",
+        "\\textit", "\\textup", "\\emph",
     ],
     props: {
         numArgs: 1,