[Ada] Remove doc for language version switches

Remove documentation for Ada language version switches, and note that
they are no longer needed.  These tools now silently ignore such
switches, and process the file correctly no matter what version of Ada
is used.

2019-08-12  Bob Duff  <duff@adacore.com>

gcc/ada/

	* doc/gnat_ugn/gnat_utility_programs.rst (gnatmetric, gnatpp,
	gnatstub): Remove documentation for Ada language version
	switches, and note that they are no longer needed.

From-SVN: r274299

gcc/ada/ChangeLog

+2019-08-12  Bob Duff  <duff@adacore.com>
+
+	* doc/gnat_ugn/gnat_utility_programs.rst (gnatmetric, gnatpp,
+	gnatstub): Remove documentation for Ada language version
+	switches, and note that they are no longer needed.
+
 2019-08-12  Gary Dismukes  <dismukes@adacore.com>
 
 	* sem_ch5.adb (Prepare_Param_Spec_Loop): Set the parents of the

gcc/ada/doc/gnat_ugn/gnat_utility_programs.rst

@@ -1797,9 +1797,6 @@ Alternatively, you may run the script using the following command line:
   .. index:: ! gnatmetric
   .. index:: Metric tool
 
-  This documentation is for the new libadalang-based version
-  of ``gnatmetric``, which replaces the ASIS-based version.
-
   The ``gnatmetric`` tool is a utility
   for computing various program metrics.
   It takes an Ada source file as input and generates a file containing the
@@ -1822,14 +1819,16 @@ Alternatively, you may run the script using the following command line:
   * ``switches`` specify the metrics to compute and define the destination for
     the output
 
-  * Each ``filename`` is the name (including the extension) of a source
-    file to process. 'Wildcards' are allowed, and
-    the file name may contain path information.
-    If no ``filename`` is supplied, then the ``switches`` list must contain
-    at least one
-    :switch:`--files` switch (see :ref:`Other_gnatmetric_Switches`).
-    Including both a :switch:`--files` switch and one or more
-    ``filename`` arguments is permitted.
+  * Each ``filename`` is the name of a source file to process. 'Wildcards' are
+    allowed, and the file name may contain path information.  If no
+    ``filename`` is supplied, then the ``switches`` list must contain at least
+    one :switch:`--files` switch (see :ref:`Other_gnatmetric_Switches`).
+    Including both a :switch:`--files` switch and one or more ``filename``
+    arguments is permitted.
+
+    Note that it is no longer necessary to specify the Ada language version;
+    ``gnatmetric`` can process Ada source code written in any version from
+    Ada 83 onward without specifying any language version switch.
 
   The following subsections describe the various switches accepted by
   ``gnatmetric``, organized by category.
@@ -1928,6 +1927,16 @@ Alternatively, you may run the script using the following command line:
     to exclude all directory information from the file names that are
     output.)
 
+   .. index:: --wide-character-encoding (gnatmetric)
+
+   :switch:`--wide-character-encoding={e}`
+     Specify the wide character encoding method for the input and output
+     files. ``e`` is one of the following:
+
+     * *8* - UTF-8 encoding
+
+     * *b* - Brackets encoding (default value)
+
 
   .. index:: Disable Metrics For Local Units in gnatmetric
 
@@ -2811,6 +2820,11 @@ Alternatively, you may run the script using the following command line:
   :switch:`-sfn`
     :switch:`--short-file-names`
 
+  .. index:: -W (gnatsmetric)
+
+  :switch:`-W{e}`
+    :switch:`--wide-character-encoding={e}`
+
   .. index:: -nolocal (gnatmetric)
 
   :switch:`-nolocal`
@@ -2846,9 +2860,6 @@ Alternatively, you may run the script using the following command line:
    .. index:: ! gnatpp
    .. index:: pretty printer
 
-   This documentation is for the new libadalang-based version
-   of ``gnatpp``, which replaces the ASIS-based version.
-
    The ``gnatpp`` tool is a utility for source reformatting / pretty
    printing. It takes an Ada source file as input and generates a
    reformatted version as output. You can specify various style
@@ -2880,6 +2891,10 @@ Alternatively, you may run the script using the following command line:
      file name may contain path information; it does not have to follow
      the GNAT file naming rules
 
+     Note that it is no longer necessary to specify the Ada language version;
+     ``gnatpp`` can process Ada source code written in any version from
+     Ada 83 onward without specifying any language version switch.
+
 
    .. _Switches_for_gnatpp:
 
@@ -3633,30 +3648,6 @@ Alternatively, you may run the script using the following command line:
    all the immediate units of the argument project.
 
 
-   .. index:: --gnat83 (gnatpp)
-
-   :switch:`--gnat83`
-     Ada 83 mode
-
-
-   .. index:: --gnat95 (gnatpp)
-
-   :switch:`--gnat95`
-     Ada 95 mode
-
-
-   .. index:: --gnat2005 (gnatpp)
-
-   :switch:`--gnat2005`
-     Ada 2005 mode
-
-
-   .. index:: --gnat2012 (gnatpp)
-
-   :switch:`--gnat2012`
-     Ada 2012 mode
-
-
    .. _Formatting_Rules:
 
    Formatting Rules
@@ -4243,6 +4234,10 @@ Alternatively, you may run the script using the following command line:
       or creates the name file to generate using the standard GNAT
       naming conventions.
 
+      Note that it is no longer necessary to specify the Ada language version;
+      ``gnatmetric`` can process Ada source code written in any version from
+      Ada 83 onward without specifying any language version switch.
+
   * *switches*
       is an optional sequence of switches as described in the next section
 
@@ -4402,30 +4397,6 @@ Alternatively, you may run the script using the following command line:
     * *b* - Brackets encoding (default value)
 
 
-  .. index:: --gnat83 (gnatstub)
-
-  :switch:`--gnat83`
-    Ada 83 mode
-
-
-  .. index:: --gnat95 (gnatstub)
-
-  :switch:`--gnat95`
-    Ada 95 mode
-
-
-  .. index:: --gnat2005 (gnatstub)
-
-  :switch:`--gnat2005`
-    Ada 2005 mode
-
-
-  .. index:: --gnat2012 (gnatstub)
-
-  :switch:`--gnat2012`
-    Ada 2012 mode
-
-
   .. index:: --quiet (gnatstub)
   .. index:: -q (gnatstub)