vfs: fix typo in comment (remove extra "l")

Differential Revision: https://phab.mercurial-scm.org/D8297

mercurial/vfs.py

@@ -417,7 +417,7 b' class vfs(abstractvfs):'
            file were opened multiple times, there could be unflushed data
            because the original file handle hasn't been flushed/closed yet.)
 
-        ``checkambig`` argument is passed to atomictemplfile (valid
+        ``checkambig`` argument is passed to atomictempfile (valid
         only for writing), and is useful only if target file is
         guarded by any lock (e.g. repo.lock or repo.wlock).