fix(library/init/lean/parser/reader/term): add missing file

library/init/lean/parser/reader/term.lean

@@ -0,0 +1,26 @@
+/-
+Copyright (c) 2018 Microsoft Corporation. All rights reserved.
+Released under Apache 2.0 license as described in the file LICENSE.
+Author: Sebastian Ullrich
+
+Term-level readers and macros
+-/
+prelude
+import init.lean.parser.reader.token
+
+namespace lean.parser
+namespace reader
+open combinators
+
+def hole := {macro . name := `hole}
+
+def hole.reader : reader :=
+node hole [symbol "_"]
+
+def term.reader :=
+any_of [
+  hole.reader
+]
+
+end reader
+end lean.parser