Fix font choice in operators like \log (e.g. \boldsymbol{\log}) (#2041)

* Fix font choice in operators like \log (e.g. \boldsymbol{\log})

Fix #1971 by correctly passing arguments into the font choice for
the HTML handler for operators like \log.

* Extend BoldSymbol screenshot test

* Require options argument in mathsym to avoid this type of bug in the future

* Update screenshot

src/buildCommon.js

@@ -103,13 +103,11 @@ const makeSymbol = function(
 /**
  * Makes a symbol in Main-Regular or AMS-Regular.
  * Used for rel, bin, open, close, inner, and punct.
- *
- * TODO(#953): Make `options` mandatory and always pass it in.
  */
 const mathsym = function(
     value: string,
     mode: Mode,
-    options?: Options,
+    options: Options,
     classes?: string[] = [],
 ): SymbolNode {
     // Decide what font to render the symbol in by its entry in the symbols
@@ -119,7 +117,7 @@ const mathsym = function(
     // text ordinal and is therefore not present as a symbol in the symbols
     // table for text, as well as a special case for boldsymbol because it
     // can be used for bold + and -
-    if ((options && options.font && options.font === "boldsymbol") &&
+    if (options.font === "boldsymbol" &&
             lookupSymbol(value, "Main-Bold", mode).metrics) {
         return makeSymbol(value, "Main-Bold", mode, options,
             classes.concat(["mathbf"]));

src/functions/op.js

@@ -105,7 +105,7 @@ export const htmlBuilder: HtmlBuilderSupSub<"op"> = (grp, options) => {
         // operators, like \limsup
         const output = [];
         for (let i = 1; i < group.name.length; i++) {
-            output.push(buildCommon.mathsym(group.name[i], group.mode));
+            output.push(buildCommon.mathsym(group.name[i], group.mode, options));
         }
         base = buildCommon.makeSpan(["mop"], output, options);
     }