Update kruskal_wallis.js

The QtScript has informed of an error:

Script Error in file:///usr/share/rkward/phpfiles/common.js, line 31: TypeError: Cannot read property 'noquote' of undefined
Backtrace:
quote@file:///usr/share/rkward/phpfiles/common.js:31
makeHeaderCode@file:///usr/share/rkward/phpfiles/common.js:91
@file:///usr/share/rkward/phpfiles/common.js:113
printout@file:///home/username/R/x86_64-pc-linux-gnu-library/4.2/rkTeaching/rkward/plugins/non_parametric_tests/kruskal_wallis.js:68
do_printout@file:///usr/share/rkward/phpfiles/common.js:178
%entry@:1

inst/rkward/plugins/non_parametric_tests/kruskal_wallis.js

@@ -56,7 +56,7 @@ function printout() {
 	// Header
 	header = new Header(i18n("Kruskal-Wallis test for comparing the distribution of %1 according to %2", variableName, factorName));
 	header.add(i18n("Data frame"), dataframe);
-	header.add(i18n("Comparison of %1 according to %2", variableName, factorName));
+	header.add(i18n("Comparison of"), i18n("%1 according to %2", variableName, factorName));
 	header.add(i18n("Null hypothesis"), i18n("There is no significant difference between the populations"));
 	header.add(i18n("Alternative hypothesis"), i18n("There are significant difference between at least two populations"));
 	if (grouped) {
@@ -104,4 +104,4 @@ function printout() {
 			echo('))\n');
 		}
 	}
-}
+}