[Ada] Clarify the documentation of -gnaty0 style check option

gcc/ada/

	* doc/gnat_ugn/building_executable_programs_with_gnat.rst:
	Instead of referring to the formatting of the Ada examples in
	Ada RM add use the list of checks that are actually performed.
	* gnat_ugn.texi: Regenerate.

2 files changed, 31 insertions, 4 deletions

diff --git a/gcc/ada/doc/gnat_ugn/building_executable_programs_with_gnat.rst b/gcc/ada/doc/gnat_ugn/building_executable_programs_with_gnat.rst
index 3da03df..63b3f17 100644
--- a/gcc/ada/doc/gnat_ugn/building_executable_programs_with_gnat.rst
+++ b/gcc/ada/doc/gnat_ugn/building_executable_programs_with_gnat.rst
@@ -4629,8 +4629,18 @@ checks to be performed. The following checks are defined:
   in the string after :switch:`-gnaty`
   then proper indentation is checked, with the digit indicating the
   indentation level required. A value of zero turns off this style check.
-  The general style of required indentation is as specified by
-  the examples in the Ada Reference Manual. Full line comments must be
+  The rule checks that the following constructs start on a column that is
+  a multiple of the alignment level:
+
+  * beginnings of declarations (except record component declarations)
+    and statements;
+
+  * beginnings of the structural components of compound statements;
+
+  * ``end`` keyword that completes the declaration of a program unit declaration
+    or body or that completes a compound statement.
+
+  Full line comments must be
   aligned with the ``--`` starting on a column that is a multiple of
   the alignment level, or they may be aligned the same way as the following
   non-blank line (this is useful when full line comments appear in the middle
diff --git a/gcc/ada/gnat_ugn.texi b/gcc/ada/gnat_ugn.texi
index e6078e6..78814c3 100644
--- a/gcc/ada/gnat_ugn.texi
+++ b/gcc/ada/gnat_ugn.texi
@@ -13227,8 +13227,25 @@ If a digit from 1-9 appears
 in the string after @code{-gnaty}
 then proper indentation is checked, with the digit indicating the
 indentation level required. A value of zero turns off this style check.
-The general style of required indentation is as specified by
-the examples in the Ada Reference Manual. Full line comments must be
+The rule checks that the following constructs start on a column that is
+a multiple of the alignment level:
+
+
+@itemize *
+
+@item 
+beginnings of declarations (except record component declarations)
+and statements;
+
+@item 
+beginnings of the structural components of compound statements;
+
+@item 
+@code{end} keyword that completes the declaration of a program unit declaration
+or body or that completes a compound statement.
+@end itemize
+
+Full line comments must be
 aligned with the @code{--} starting on a column that is a multiple of
 the alignment level, or they may be aligned the same way as the following
 non-blank line (this is useful when full line comments appear in the middle