[Ada] Fix layout of tables in PDF version of GNAT RM

Tables with small left columns and large right columns had colliding
text in the PDF version of GNAT RM.

Spotted while adding description of pragma Ada_2022.

gcc/ada/

	* doc/gnat_rm/implementation_defined_characteristics.rst: Add
	tabularcolums directive, as explained in documentation of Sphinx
	and tabular LaTeX package.

diff --git a/gcc/ada/doc/gnat_rm/implementation_defined_characteristics.rst b/gcc/ada/doc/gnat_rm/implementation_defined_characteristics.rst
index d1768d2fe83dc94b2e7bd4f08fead5cfe2cf3b41..095d04b5a267ac46240ed09306978c6598626485 100644 (file)
--- a/gcc/ada/doc/gnat_rm/implementation_defined_characteristics.rst
+++ b/gcc/ada/doc/gnat_rm/implementation_defined_characteristics.rst
@@ -100,6 +100,8 @@ The Static_Predicate case is handled analogously.
   "The predefined integer types declared in
   ``Standard``.  See 3.5.4(25)."
 
+.. tabularcolumns:: |l|L|
+
 ========================= =======================================
 Type                       Representation
 ========================= =======================================
@@ -837,6 +839,8 @@ Containers.Count_Type'Last is 2**31 - 1.
 
 The following convention names are supported
 
+.. tabularcolumns:: |l|L|
+
 ======================= ==============================================================================
 Convention Name         Interpretation
 ======================= ==============================================================================