Fixed from failing prematurely on partially matching literals

src/main/java/com/mojang/brigadier/CommandDispatcher.java

@@ -94,6 +94,11 @@ public class CommandDispatcher<S> {
             final int cursor = reader.getCursor();
             try {
                 child.parse(reader, context);
+                if (reader.canRead()) {
+                    if (reader.peek() != ARGUMENT_SEPARATOR_CHAR) {
+                        throw ERROR_EXPECTED_ARGUMENT_SEPARATOR.createWithContext(reader);
+                    }
+                }
             } catch (final CommandException ex) {
                 errors.put(child, ex);
                 reader.setCursor(cursor);
@@ -102,9 +107,6 @@ public class CommandDispatcher<S> {
 
             context.withCommand(child.getCommand());
             if (reader.canRead()) {
-                if (reader.peek() != ARGUMENT_SEPARATOR_CHAR) {
-                    throw ERROR_EXPECTED_ARGUMENT_SEPARATOR.createWithContext(reader);
-                }
                 reader.skip();
                 if (child.getRedirect() != null) {
                     return parseNodes(child.getRedirect(), reader, context.redirect());

src/test/java/com/mojang/brigadier/CommandDispatcherTest.java

@@ -22,6 +22,7 @@ import static org.junit.Assert.fail;
 import static org.mockito.Matchers.notNull;
 import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -207,6 +208,17 @@ public class CommandDispatcherTest {
         }
     }
 
+    @Test
+    public void testExecute_invalidOther() throws Exception {
+        final Command<Object> wrongCommand = mock(Command.class);
+        subject.register(literal("w").executes(wrongCommand));
+        subject.register(literal("world").executes(command));
+
+        assertThat(subject.execute("world", source), is(42));
+        verify(wrongCommand, never()).run(any());
+        verify(command).run(any());
+    }
+
     @Test
     public void parse_noSpaceSeparator() throws Exception {
         subject.register(literal("foo").then(argument("bar", integer()).executes(command)));