truncate: add Dutch translation and fix placeholders (#13186)

pages/common/truncate.md

@@ -5,20 +5,20 @@
 
 - Set a size of 10 GB to an existing file, or create a new file with the specified size:
 
-`truncate --size {{10G}} {{filename}}`
+`truncate --size 10G {{path/to/file}}`
 
 - Extend the file size by 50 MiB, fill with holes (which reads as zero bytes):
 
-`truncate --size +{{50M}} {{filename}}`
+`truncate --size +50M {{path/to/file}}`
 
 - Shrink the file by 2 GiB, by removing data from the end of file:
 
-`truncate --size -{{2G}} {{filename}}`
+`truncate --size -2G {{path/to/file}}`
 
 - Empty the file's content:
 
-`truncate --size 0 {{filename}}`
+`truncate --size 0 {{path/to/file}}`
 
 - Empty the file's content, but do not create the file if it does not exist:
 
-`truncate --no-create --size 0 {{filename}}`
+`truncate --no-create --size 0 {{path/to/file}}`