Simplify TextProvider, Fix all @text ending with space

This commit simplifies TextProvider to be a lot clearer and also avoid swallowing an unnecessary exception.

Furthermore, it changes its behaviour so that created text does not always have a space at the end. Usually, people don't mean to add an unnecessary space at the end of their text argument if they don't put more text.

The motivation for this commit is that I am currently experiencing the space problem in my usage of this library.

Thanks!

Author: xxyy

intake/src/main/java/com/sk89q/intake/parametric/provider/TextProvider.java

@@ -20,7 +20,6 @@
 package com.sk89q.intake.parametric.provider;
 
 import com.sk89q.intake.argument.ArgumentException;
-import com.sk89q.intake.argument.MissingArgumentException;
 import com.sk89q.intake.argument.CommandArgs;
 
 import javax.annotation.Nullable;
@@ -34,25 +33,13 @@ class TextProvider extends StringProvider {
     @Nullable
     @Override
     public String get(CommandArgs arguments, List<? extends Annotation> modifiers) throws ArgumentException {
-        StringBuilder builder = new StringBuilder();
-        boolean first = true;
-        while (true) {
-            if (!first) {
-                builder.append(" ");
-            }
-            try {
-                builder.append(arguments.next());
-            } catch (MissingArgumentException ignored) {
-                break;
-            }
-            first = false;
+        StringBuilder builder = new StringBuilder(arguments.next()); //throws an exception if there's no first arg
+        while (arguments.hasNext()) {
+            builder.append(" ").append(arguments.next());
         }
-        if (first) {
-            throw new MissingArgumentException();
-        }
-        String v = builder.toString();
-        validate(v, modifiers);
-        return v;
+        String text = builder.toString();
+        validate(text, modifiers);
+        return text;
     }
 
 }