Update grammar in the Terms section of Gallina chapter

Update doc_grammar tool

The grammar in the doc is generated semi-automatically with doc_grammar:
- the grammar is automatically extracted from the mlg files
- developer-prepared editing scripts *.mlg_edit modify the extracted
  grammar for clarity, simplicity and ordering of productions
- chunks of the resulting grammar are automatically inserted into the
  rsts using instructions embedded in the rsts

Running doc_grammar is currently a manual step.

The grammar updates in the rst files have been manually reviewed.

1 files changed, 1 insertions, 1 deletions

diff --git a/doc/sphinx/user-extensions/syntax-extensions.rst b/doc/sphinx/user-extensions/syntax-extensions.rst
index 02910e603a..dbe714c388 100644
--- a/doc/sphinx/user-extensions/syntax-extensions.rst
+++ b/doc/sphinx/user-extensions/syntax-extensions.rst
@@ -871,7 +871,7 @@ notations are given below. The optional :production:`scope` is described in
                  : Inductive `ind_body` [`decl_notation`] with … with `ind_body` [`decl_notation`].
                  : CoInductive `ind_body` [`decl_notation`] with … with `ind_body` [`decl_notation`].
                  : Fixpoint `fix_body` [`decl_notation`] with … with `fix_body` [`decl_notation`].
-                 : CoFixpoint `cofix_body` [`decl_notation`] with … with `cofix_body` [`decl_notation`].
+                 : CoFixpoint `fix_body` [`decl_notation`] with … with `fix_body` [`decl_notation`].
                  : [Local] Declare Custom Entry `ident`.
    decl_notation : [where `string` := `term` [: `scope`] and … and `string` := `term` [: `scope`]].
    modifiers     : `modifier`, … , `modifier`