GL: minor.

src/Magnum/GL/Context.cpp

@@ -615,8 +615,7 @@ Context::Context(NoCreateT, Int argc, const char** argv, void functionLoader(Con
 Context::Context(NoCreateT, Utility::Arguments& args, Int argc, const char** argv, void functionLoader(Context&)): _functionLoader{functionLoader}, _version{Version::None} {
     /* Parse arguments */
     CORRADE_INTERNAL_ASSERT(args.prefix() == "magnum");
-    args.addOption("disable-workarounds")
+    args.addOption("disable-workarounds").setHelp("disable-workarounds", "driver workarounds to disable\n      (see https://doc.magnum.graphics/magnum/opengl-workarounds.html for detailed info)", "LIST")
-        .setHelp("disable-workarounds", "driver workarounds to disable\n      (see https://doc.magnum.graphics/magnum/opengl-workarounds.html for detailed info)", "LIST")
         .addOption("disable-extensions").setHelp("disable-extensions", "API extensions to disable", "LIST")
         .addOption("gpu-validation", "off").setHelp("gpu-validation", "GPU validation using KHR_debug (if present)", "off|on")
         .addOption("log", "default").setHelp("log", "console logging", "default|quiet|verbose")