tb -trees ; rl ; path in gfe ; removed spurious "file not found"

src/HelpFile

@@ -51,7 +51,7 @@ i,  import: i File
       i English.gf                      -- ordinary import of Concrete
       i -retain german/ParadigmsGer.gf  -- import of Resource to test
       
-* rl, remove_language: rl Language
+rl, remove_language: rl Language
       Takes away the language from the state.
 
 e,  empty: e
@@ -207,10 +207,12 @@ tb, tree_bank: tb
       to an existing treebank.
   options:
      -c        compare to existing xml-formatted treebank
+     -trees    return the trees of the treebank
      -xml      wrap the treebank (or comparison results) with XML tags
   examples:
      gr -cat=S -number=100 | tb -xml | wf tb.xml -- random treebank into file
-     rf tb.txt | tb -c                           -- read comparison treebank from file
+     rf tb.xml | tb -c                           -- compare-test treebank from file
+     rf old.xml | tb -trees | tb -xml            -- create new treebank from old
 
 tt, test_tokenizer: tt String
       Show the token list sent to the parser when String is parsed.