Merge branch 'raimo/new-gen-state-machine/OTP-13065'

* raimo/new-gen-state-machine/OTP-13065: (52 commits)
  Add section on state filtering
  Promote gen_statem over gen_fsm
  Modify code_change/4 to return CallbackMode
  Use ?NAME macro in examples
  Introduce Fred Herbert suggested additions
  Introduce corrections from Fred Hebert and Ingela
  Use .png pictures instead of .gif
  Write Design Principles chapter
  Fix missing short forms for event timeout
  Do more intricate Fred Hebert doc changes
  Change Caller -> From as suggested by Fred Hebert
  Do documentation improvements from Fred Hebert
  Fix broken documenation reference
  Rename state_timeout -> event_timeout
  Fix most of the system docs and emacs mode
  Change code_change/4 to {ok,State,Data}
  Fixup sharpened test suite
  Sharpen test suite
  Remove the remove_event action and all alike
  Relax caller() type check and cleanup
  ...

Conflicts:
	lib/stdlib/src/gen.erl
	lib/stdlib/src/gen_event.erl
	lib/stdlib/src/gen_fsm.erl
	lib/stdlib/src/gen_server.erl
	lib/stdlib/test/error_logger_forwarder.erl

1 files changed, 5 insertions, 3 deletions

diff --git a/lib/stdlib/doc/src/supervisor.xml b/lib/stdlib/doc/src/supervisor.xml
index 421306283c..29e5a732d5 100644
--- a/lib/stdlib/doc/src/supervisor.xml
+++ b/lib/stdlib/doc/src/supervisor.xml
@@ -34,8 +34,8 @@
     <p>A behaviour module for implementing a supervisor, a process which
       supervises other processes called child processes. A child
       process can either be another supervisor or a worker process.
-      Worker processes are normally implemented using one of
-      the <c>gen_event</c>, <c>gen_fsm</c>, or <c>gen_server</c>
+      Worker processes are normally implemented using one of the
+      <c>gen_event</c>, <c>gen_fsm</c>, <c>gen_statem</c> or <c>gen_server</c>
       behaviours. A supervisor implemented using this module will have
       a standard set of interface functions and include functionality
       for tracing and error reporting. Supervisors are used to build a
@@ -221,7 +221,8 @@
         <p><c>modules</c> is used by the release handler during code
           replacement to determine which processes are using a certain
           module. As a rule of thumb, if the child process is a
-          <c>supervisor</c>, <c>gen_server</c>, or <c>gen_fsm</c>,
+          <c>supervisor</c>, <c>gen_server</c>,
+	  <c>gen_fsm</c> or <c>gen_statem</c>
 	  this should be a list with one element <c>[Module]</c>,
 	  where <c>Module</c> is the callback module. If the child
 	  process is an event manager (<c>gen_event</c>) with a
@@ -636,6 +637,7 @@
     <title>SEE ALSO</title>
     <p><seealso marker="gen_event">gen_event(3)</seealso>, 
       <seealso marker="gen_fsm">gen_fsm(3)</seealso>, 
+      <seealso marker="gen_statem">gen_statem(3)</seealso>,
       <seealso marker="gen_server">gen_server(3)</seealso>, 
       <seealso marker="sys">sys(3)</seealso></p>
   </section>