[spec] Fix single-table limitation in module instantiation (#1434)

Author: keithw

document/core/exec/modules.rst

@@ -657,19 +657,17 @@ It is up to the :ref:`embedder <embedder>` to define how such conditions are rep
 
 14. For each :ref:`element segment <syntax-elem>` :math:`\elem_i` in :math:`\module.\MELEMS` whose :ref:`mode <syntax-elemmode>` is of the form :math:`\EACTIVE~\{ \ETABLE~\tableidx_i, \EOFFSET~\X{einstr}^\ast_i~\END \}`, do:
 
-    a. Assert: :math:`\tableidx_i` is :math:`0`.
+    a. Let :math:`n` be the length of the vector :math:`\elem_i.\EINIT`.
 
-    b. Let :math:`n` be the length of the vector :math:`\elem_i.\EINIT`.
+    b. :ref:`Execute <exec-instr-seq>` the instruction sequence :math:`\X{einstr}^\ast_i`.
 
-    c. :ref:`Execute <exec-instr-seq>` the instruction sequence :math:`\X{einstr}^\ast_i`.
+    c. :ref:`Execute <exec-const>` the instruction :math:`\I32.\CONST~0`.
 
-    d. :ref:`Execute <exec-const>` the instruction :math:`\I32.\CONST~0`.
-
-    e. :ref:`Execute <exec-const>` the instruction :math:`\I32.\CONST~n`.
+    d. :ref:`Execute <exec-const>` the instruction :math:`\I32.\CONST~n`.
 
-    f. :ref:`Execute <exec-table.init>` the instruction :math:`\TABLEINIT~i`.
+    e. :ref:`Execute <exec-table.init>` the instruction :math:`\TABLEINIT~\tableidx_i~i`.
 
-    g. :ref:`Execute <exec-elem.drop>` the instruction :math:`\ELEMDROP~i`.
+    f. :ref:`Execute <exec-elem.drop>` the instruction :math:`\ELEMDROP~i`.
 
 15. For each :ref:`data segment <syntax-data>` :math:`\data_i` in :math:`\module.\MDATAS` whose :ref:`mode <syntax-datamode>` is of the form :math:`\DACTIVE~\{ \DMEM~\memidx_i, \DOFFSET~\X{dinstr}^\ast_i~\END \}`, do: