allow for more characters in file names.

docs/scarpet/api/Auxiliary.md

@@ -200,7 +200,7 @@ With the specified `resource` in the scripts folder, of a specific `type`, write
  content, or deletes the resource.
 
 Resource is identified by a path to the file.  
-A path can contain letters, numbers and folder separator: `'/'`. Any other characters are stripped
+A path can contain letters, numbers, characters `-`, `+`, or `_`, and a folder separator: `'/'`. Any other characters are stripped
 from the name. Empty descriptors are invalid. Do not add file extensions to the descriptor - extensions are inferred
 based on the `type` of the file.
  

src/main/java/carpet/script/CarpetExpression.java

@@ -1396,13 +1396,14 @@ public class CarpetExpression
         });
 
         this.expr.addLazyFunction("scoreboard_remove", -1, (c, t, lv)-> {
+            if (lv.size()==0) throw new InternalExpressionException("'scoreboard_remove' requires at least one parameter");
             CarpetContext cc = (CarpetContext)c;
             Scoreboard scoreboard =  cc.s.getMinecraftServer().getScoreboard();
             String objectiveName = lv.get(0).evalValue(c).getString();
             ScoreboardObjective objective = scoreboard.getObjective(objectiveName);
             if (objective == null)
                 return LazyValue.FALSE;
-            if (lv.size() == 0)
+            if (lv.size() == 1)
             {
                 scoreboard.removeObjective(objective);
                 return LazyValue.TRUE;
@@ -2621,7 +2622,7 @@ public class CarpetExpression
     public static String recognizeResource(Value value)
     {
         String origfile = value.getString();
-        String file = origfile.toLowerCase(Locale.ROOT).replaceAll("[^A-Za-z0-9/]", "");
+        String file = origfile.toLowerCase(Locale.ROOT).replaceAll("[^A-Za-z0-9\\-+_/]", "");
         file = Arrays.stream(file.split("/+")).filter(s -> !s.isEmpty()).collect(Collectors.joining("/"));
         if (file.isEmpty())
         {