Document: --cookie library-name="..."

CHANGES.org

@@ -6,6 +6,8 @@
 - Remove hard-coded knowledge of a few specific ppx rewriters to ease
   maintenance moving forward
 
+- Pass the library name to ppx rewriters via the =library-name= cookie
+
 - Fix: make sure the action working directory exist before running it
 
 * 1.0+beta7 (12/04/2017)

doc/manual.org

@@ -1303,7 +1303,8 @@ Jbuilder will invoke the executable resulting from linking the
 libraries given in the =(pps ...)= form as follows:
 
 #+begin_src sh
-ppx.exe <flags-written-by-user> --dump-ast -o <output-file> [--impl|--intf] <source-file>
+ppx.exe <flags-written-by-user> --dump-ast -o <output-file> \
+  [--cookie library-name="<name>"] [--impl|--intf] <source-file>
 #+end_src
 
 Where =<source-file>= is either an implementation (=.ml=) or interface