'missing ) after formal parameters' with HTMX 1.9.10

Start by reproducing the reported JavaScript parsing error with HtmlUnit 3.9.0 and HTMX 1.9.10, then compare the failing script with the version that works, HTMX 1.9.9. The report does not identify a source file or test; trace the JavaScript compilation path shown in the stack trace and add a regression test for the failing script. Done means the newer HTMX script loads without the reported syntax error.

I have HtmlUnit 3.9.0 tests that work with HTMX 1.9.9, but when I upgrade to HTMX 1.9.10, I this error:

2024-01-08T09:41:35.431+01:00 ERROR 4784 --- [TAP] [           main] o.h.j.DefaultJavaScriptErrorListener     : Error during JavaScript execution

org.htmlunit.ScriptException: missing ) after formal parameters (http://localhost:35781/internal/assets/webjars/htmx.org/1.9.10/dist/htmx.min.js#1)
	at org.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:1014) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.corejs.javascript.Context.call(Context.java:581) ~[htmlunit-core-js-3.9.0.jar:3.9.0]
	at org.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:481) ~[htmlunit-core-js-3.9.0.jar:3.9.0]
	at org.htmlunit.javascript.HtmlUnitContextFactory.callSecured(HtmlUnitContextFactory.java:347) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.javascript.JavaScriptEngine.compile(JavaScriptEngine.java:844) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.javascript.JavaScriptEngine.compile(JavaScriptEngine.java:810) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.javascript.JavaScriptEngine.compile(JavaScriptEngine.java:113) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.html.HtmlPage.loadJavaScriptFromUrl(HtmlPage.java:1152) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.html.HtmlPage.loadExternalJavaScriptFile(HtmlPage.java:1024) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.html.ScriptElementSupport.executeScriptIfNeeded(ScriptElementSupport.java:194) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.html.ScriptElementSupport$1.execute(ScriptElementSupport.java:118) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.html.ScriptElementSupport.onAllChildrenAddedToPage(ScriptElementSupport.java:141) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.html.HtmlScript.onAllChildrenAddedToPage(HtmlScript.java:192) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.html.parser.neko.HtmlUnitNekoDOMBuilder.endElement(HtmlUnitNekoDOMBuilder.java:599) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.cyberneko.xerces.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:411) ~[neko-htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.html.parser.neko.HtmlUnitNekoDOMBuilder.endElement(HtmlUnitNekoDOMBuilder.java:548) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.cyberneko.HTMLTagBalancer.callEndElement(HTMLTagBalancer.java:1270) ~[neko-htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.cyberneko.HTMLTagBalancer.endElement(HTMLTagBalancer.java:1198) ~[neko-htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.cyberneko.filters.DefaultFilter.endElement(DefaultFilter.java:201) ~[neko-htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.cyberneko.filters.NamespaceBinder.endElement(NamespaceBinder.java:268) ~[neko-htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.cyberneko.HTMLScanner$ContentScanner.scanEndElement(HTMLScanner.java:2990) ~[neko-htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.cyberneko.HTMLScanner$ContentScanner.scan(HTMLScanner.java:1980) ~[neko-htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.cyberneko.HTMLScanner.scanDocument(HTMLScanner.java:814) ~[neko-htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.cyberneko.HTMLConfiguration.parse(HTMLConfiguration.java:344) ~[neko-htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.cyberneko.HTMLConfiguration.parse(HTMLConfiguration.java:302) ~[neko-htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.cyberneko.xerces.parsers.XMLParser.parse(XMLParser.java:72) ~[neko-htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.html.parser.neko.HtmlUnitNekoDOMBuilder.parse(HtmlUnitNekoDOMBuilder.java:842) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.html.parser.neko.HtmlUnitNekoHtmlParser.parse(HtmlUnitNekoHtmlParser.java:202) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.DefaultPageCreator.createHtmlPage(DefaultPageCreator.java:308) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.DefaultPageCreator.createPage(DefaultPageCreator.java:227) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.WebClient.loadWebResponseInto(WebClient.java:671) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.WebClient.loadWebResponseInto(WebClient.java:573) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.WebClient.getPage(WebClient.java:491) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.WebClient.getPage(WebClient.java:398) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.WebClient.getPage(WebClient.java:536) ~[htmlunit-3.9.0.jar:3.9.0]
	at org.htmlunit.WebClient.getPage(WebClient.java:518) ~[htmlunit-3.9.0.jar:3.9.0]
        (...)