ada: Make minor improvements to user's guide

gcc/ada/

	* doc/gnat_ugn/about_this_guide.rst: Fix typo. Uniformize punctuation.
	* doc/gnat_ugn/the_gnat_compilation_model.rst: Uniformize punctuation.
	Fix capitalization. Fix indentation of code block. Fix RST formatting
	syntax errors.
	* gnat_ugn.texi: Regenerate.

3 files changed, 36 insertions, 37 deletions

diff --git a/gcc/ada/doc/gnat_ugn/about_this_guide.rst b/gcc/ada/doc/gnat_ugn/about_this_guide.rst
index 3347626..18cfb02 100644
--- a/gcc/ada/doc/gnat_ugn/about_this_guide.rst
+++ b/gcc/ada/doc/gnat_ugn/about_this_guide.rst
@@ -38,17 +38,17 @@ This guide contains the following chapters:
   using the GNU make utility with GNAT.
 
 * :ref:`GNAT_Utility_Programs` explains the various utility programs that
-  are included in the GNAT environment
+  are included in the GNAT environment.
 
 * :ref:`GNAT_and_Program_Execution` covers a number of topics related to
-  running, debugging, and tuning the performace of programs developed
-  with GNAT
+  running, debugging, and tuning the performance of programs developed
+  with GNAT.
 
 Appendices cover several additional topics:
 
 * :ref:`Platform_Specific_Information` describes the different run-time
   library implementations and also presents information on how to use
-  GNAT on several specific platforms
+  GNAT on several specific platforms.
 
 * :ref:`Example_of_Binder_Output_File` shows the source code for the binder
   output file for a sample program.
diff --git a/gcc/ada/doc/gnat_ugn/the_gnat_compilation_model.rst b/gcc/ada/doc/gnat_ugn/the_gnat_compilation_model.rst
index 77a2055..c7f15b4 100644
--- a/gcc/ada/doc/gnat_ugn/the_gnat_compilation_model.rst
+++ b/gcc/ada/doc/gnat_ugn/the_gnat_compilation_model.rst
@@ -168,7 +168,7 @@ GNAT also supports several other 8-bit coding schemes:
 
 *ISO 8859-15 (Latin-9)*
   ISO 8859-15 (Latin-9) letters allowed in identifiers, with uppercase and
-  lowercase equivalence
+  lowercase equivalence.
 
 .. index:: code page 437 (IBM PC)
 
@@ -1778,8 +1778,8 @@ default, that contains calls to the elaboration procedures of those
 compilation unit that require them, followed by
 a call to the main program. This Ada program is compiled to generate the
 object file for the main program. The name of
-the Ada file is :file:`b~xxx`.adb` (with the corresponding spec
-:file:`b~xxx`.ads`) where ``xxx`` is the name of the
+the Ada file is :file:`b~xxx.adb` (with the corresponding spec
+:file:`b~xxx.ads`) where ``xxx`` is the name of the
 main program unit.
 
 Finally, the linker is used to build the resulting executable program,
@@ -3590,7 +3590,7 @@ Convention identifiers are recognized by GNAT:
   Ada compiler for further details on elaboration.
 
   However, it is not possible to mix the tasking run time of GNAT and
-  HP Ada 83, All the tasking operations must either be entirely within
+  HP Ada 83, all the tasking operations must either be entirely within
   GNAT compiled sections of the program, or entirely within HP Ada 83
   compiled sections of the program.
 
@@ -3715,14 +3715,14 @@ Convention identifiers are recognized by GNAT:
     to perform dimensional checks:
 
 
-  .. code-block:: ada
+    .. code-block:: ada
 
-      type Distance is new Long_Float;
-      type Time     is new Long_Float;
-      type Velocity is new Long_Float;
-      function "/" (D : Distance; T : Time)
-        return Velocity;
-      pragma Import (Intrinsic, "/");
+        type Distance is new Long_Float;
+        type Time     is new Long_Float;
+        type Velocity is new Long_Float;
+        function "/" (D : Distance; T : Time)
+          return Velocity;
+        pragma Import (Intrinsic, "/");
 
     This common idiom is often programmed with a generic definition and an
     explicit body. The pragma makes it simpler to introduce such declarations.
@@ -3858,7 +3858,7 @@ considered:
 
 
 * Using GNAT and G++ from two different GCC installations: If both
-  compilers are on the :envvar`PATH`, the previous method may be used. It is
+  compilers are on the :envvar:`PATH`, the previous method may be used. It is
   important to note that environment variables such as
   :envvar:`C_INCLUDE_PATH`, :envvar:`GCC_EXEC_PREFIX`,
   :envvar:`BINUTILS_ROOT`, and
diff --git a/gcc/ada/gnat_ugn.texi b/gcc/ada/gnat_ugn.texi
index f119e9f..88123df 100644
--- a/gcc/ada/gnat_ugn.texi
+++ b/gcc/ada/gnat_ugn.texi
@@ -19,7 +19,7 @@
 
 @copying
 @quotation
-GNAT User's Guide for Native Platforms , May 09, 2023
+GNAT User's Guide for Native Platforms , Jun 01, 2023
 
 AdaCore
 
@@ -590,12 +590,12 @@ using the GNU make utility with GNAT.
 
 @item 
 @ref{b,,GNAT Utility Programs} explains the various utility programs that
-are included in the GNAT environment
+are included in the GNAT environment.
 
 @item 
 @ref{c,,GNAT and Program Execution} covers a number of topics related to
-running, debugging, and tuning the performace of programs developed
-with GNAT
+running, debugging, and tuning the performance of programs developed
+with GNAT.
 @end itemize
 
 Appendices cover several additional topics:
@@ -606,7 +606,7 @@ Appendices cover several additional topics:
 @item 
 @ref{d,,Platform-Specific Information} describes the different run-time
 library implementations and also presents information on how to use
-GNAT on several specific platforms
+GNAT on several specific platforms.
 
 @item 
 @ref{e,,Example of Binder Output File} shows the source code for the binder
@@ -1288,7 +1288,7 @@ lowercase equivalence.
 @item `ISO 8859-15 (Latin-9)'
 
 ISO 8859-15 (Latin-9) letters allowed in identifiers, with uppercase and
-lowercase equivalence
+lowercase equivalence.
 @end table
 
 @geindex code page 437 (IBM PC)
@@ -3231,8 +3231,8 @@ default, that contains calls to the elaboration procedures of those
 compilation unit that require them, followed by
 a call to the main program. This Ada program is compiled to generate the
 object file for the main program. The name of
-the Ada file is @code{b~xxx}.adb` (with the corresponding spec
-@code{b~xxx}.ads`) where @code{xxx} is the name of the
+the Ada file is @code{b~xxx.adb} (with the corresponding spec
+@code{b~xxx.ads}) where @code{xxx} is the name of the
 main program unit.
 
 Finally, the linker is used to build the resulting executable program,
@@ -5366,7 +5366,7 @@ elaboration of the GNAT components. Consult the documentation of the other
 Ada compiler for further details on elaboration.
 
 However, it is not possible to mix the tasking run time of GNAT and
-HP Ada 83, All the tasking operations must either be entirely within
+HP Ada 83, all the tasking operations must either be entirely within
 GNAT compiled sections of the program, or entirely within HP Ada 83
 compiled sections of the program.
 @end table
@@ -5537,24 +5537,20 @@ The corresponding operator declaration must have parameters and result type
 that have the same root numeric type (for example, all three are long_float
 types). This simplifies the definition of operations that use type checking
 to perform dimensional checks:
-@end itemize
 
 @example
-  type Distance is new Long_Float;
-  type Time     is new Long_Float;
-  type Velocity is new Long_Float;
-  function "/" (D : Distance; T : Time)
-    return Velocity;
-  pragma Import (Intrinsic, "/");
+type Distance is new Long_Float;
+type Time     is new Long_Float;
+type Velocity is new Long_Float;
+function "/" (D : Distance; T : Time)
+  return Velocity;
+pragma Import (Intrinsic, "/");
+@end example
 
 This common idiom is often programmed with a generic definition and an
 explicit body. The pragma makes it simpler to introduce such declarations.
 It incurs no overhead in compilation time or code size, because it is
 implemented as a single machine instruction.
-@end example
-
-
-@itemize *
 
 @item 
 General subprogram entities. This is used  to bind an Ada subprogram
@@ -5724,7 +5720,10 @@ $ gnatmake ada_unit -largs file1.o file2.o --LINK=g++
 
 @item 
 Using GNAT and G++ from two different GCC installations: If both
-compilers are on the :envvar`PATH`, the previous method may be used. It is
+compilers are on the 
+@geindex PATH
+@geindex environment variable; PATH
+@code{PATH}, the previous method may be used. It is
 important to note that environment variables such as
 @geindex C_INCLUDE_PATH
 @geindex environment variable; C_INCLUDE_PATH