Modify and enforce the file format/structure used

Convert the file format to be of the form ##_##_something.rst where the
first ## is the top-level section number and the second ## is the
second-level section number, e.g. 07_01_push_cs_api.rst means
Section 7.1 - This is now enforced in gendoc.py along with the title line
style that should be used (= for top-level, - for 2nd level) which will
give helpful suggestions if you trip up. This feels much more intuitive
now looking in /specification

scripts/gendoc.py

@@ -21,7 +21,7 @@ title_style_matchers = {
 }
 TOP_LEVEL = "="
 SECOND_LEVEL = "-"
-FILE_FORMAT_MATCHER = re.compile("^[0-9]+_[0-9]{2}_.*\.rst$")
+FILE_FORMAT_MATCHER = re.compile("^[0-9]+_[0-9]{2}[a-z]*_.*\.rst$")
 
 
 def check_valid_section(filename, section):
@@ -55,14 +55,16 @@ def check_valid_section(filename, section):
                 "style: expected '" + TOP_LEVEL + "' but got '" +
                 title_line[0] + "'"
             )
-    # anything marked as xx_x0_ is the start of a sub-section
-    elif re.match("^[0-9]+_0[0-9]{1}_", filename):
+    # anything marked as xx_xx_ is the start of a sub-section
+    elif re.match("^[0-9]+_[0-9]{2}_", filename):
         if not title_style_matchers[SECOND_LEVEL].match(title_line):
             raise Exception(
                 "The file " + filename + " is a 2nd-level section because it matches " +
-                "the filename format ##_#0_something.rst but has the wrong title " +
+                "the filename format ##_##_something.rst but has the wrong title " +
                 "style: expected '" + SECOND_LEVEL + "' but got '" +
-                title_line[0] + "'"
+                title_line[0] + "' - If this is meant to be a 3rd/4th/5th-level section " +
+                "then use the form '##_##b_something.rst' which will not apply this " +
+                "check."
             )
 
 def cat_spec_sections_to(out_file_name):

specification/01_01_typing_notifications.rst

@@ -1,8 +1,8 @@
 Typing Notifications
-====================
+--------------------
 
 Client APIs
------------
+~~~~~~~~~~~
 
 To set "I am typing for the next N msec"::
 
@@ -21,7 +21,7 @@ To set "I am no longer typing"::
   Content: { "typing": false }
 
 Client Events
--------------
+~~~~~~~~~~~~~
 
 All room members will receive an event on the event stream::
 
@@ -39,7 +39,7 @@ users who are not currently typing, as that list gets big quickly. The client
 should mark as not typing, any user ID who is not in that list.
 
 Server APIs
------------
+~~~~~~~~~~~
 
 Servers will emit EDUs in the following form::
 

specification/01_02_receipts.rst

@@ -1,5 +1,5 @@
 Receipts
-========
+--------
 
 Receipts are used to publish which events in a room the user or their devices
 have interacted with. For example, which events the user has read. For
@@ -7,7 +7,7 @@ efficiency this is done as "up to" markers, i.e. marking a particular event
 as, say, ``read`` indicates the user has read all events *up to* that event.
 
 Client-Server API
------------------
+~~~~~~~~~~~~~~~~~
 
 Clients will receive receipts in the following format::
 
@@ -58,7 +58,7 @@ other users. The server will automatically set the ``ts`` field.
 
 
 Server-Server API
------------------
+~~~~~~~~~~~~~~~~~
 
 Receipts are sent across federation as EDUs with type ``m.receipt``. The
 format of the EDUs are::
@@ -73,5 +73,5 @@ format of the EDUs are::
         ...
     }
 
-These are always sent as deltas to previously sent reciepts.
+These are always sent as deltas to previously sent receipts.
 

specification/01_03_history_visibility.rst

@@ -1,5 +1,5 @@
 Room History Visibility
-=======================
+-----------------------
 
 Whether a member of a room can see the events that happened in a room from
 before they joined the room is controlled by the ``history_visibility`` key

specification/02_02_event_signing.rst

@@ -1,8 +1,8 @@
 Signing Events
-==============
+--------------
 
 Canonical JSON
---------------
+~~~~~~~~~~~~~~
 
 Matrix events are represented using JSON objects. If we want to sign JSON
 events we need to encode the JSON as a binary string. Unfortunately the same
@@ -38,7 +38,7 @@ using this representation.
      ).encode("UTF-8")
 
 Grammar
-~~~~~~~
++++++++
 
 Adapted from the grammar in http://tools.ietf.org/html/rfc7159 removing
 insignificant whitespace, fractions, exponents and redundant character escapes
@@ -69,14 +69,14 @@ insignificant whitespace, fractions, exponents and redundant character escapes
            / %x75.30.30.31 (%x30-39 / %x61-66)        ; u001X
 
 Signing JSON
-------------
+~~~~~~~~~~~~
 
 We can now sign a JSON object by encoding it as a sequence of bytes, computing
 the signature for that sequence and then adding the signature to the original
 JSON object.
 
 Signing Details
-~~~~~~~~~~~~~~~
++++++++++++++++
 
 JSON is signed by encoding the JSON object without ``signatures`` or keys grouped
 as ``unsigned``, using the canonical encoding described above. The JSON bytes are then signed using the
@@ -133,7 +133,7 @@ and additional signatures.
       return json_object
 
 Checking for a Signature
-~~~~~~~~~~~~~~~~~~~~~~~~
+++++++++++++++++++++++++
 
 To check if an entity has signed a JSON object a server does the following
 
@@ -151,7 +151,7 @@ To check if an entity has signed a JSON object a server does the following
    the check fails. Otherwise the check succeeds.
 
 Signing Events
---------------
+~~~~~~~~~~~~~~
 
 Signing events is a more complicated process since servers can choose to redact
 non-essential parts of an event. Before signing the event it is encoded as