[Ada] Fix minor formatting issue

2019-09-18  Vasiliy Fofanov  <fofanov@adacore.com>

gcc/ada/

	* doc/gnat_rm/implementation_defined_pragmas.rst: Fix minor
	formatting issue.

From-SVN: r275854

gcc/ada/ChangeLog

+2019-09-18  Vasiliy Fofanov  <fofanov@adacore.com>
+
+	* doc/gnat_rm/implementation_defined_pragmas.rst: Fix minor
+	formatting issue.
+
 2019-09-18  Javier Miranda  <miranda@adacore.com>
 
 	* exp_disp.adb (Make_DT, Make_Secondary_DT): Remove generation

gcc/ada/doc/gnat_rm/implementation_defined_pragmas.rst

@@ -6179,7 +6179,7 @@ usually supplied automatically by the project manager. A pragma
 Source_File_Name cannot appear after a :ref:`Pragma_Source_File_Name_Project`.
 
 For more details on the use of the ``Source_File_Name`` pragma, see the
-sections on ``Using Other File Names`` and `Alternative File Naming Schemes'
+sections on `Using Other File Names` and `Alternative File Naming Schemes`
 in the :title:`GNAT User's Guide`.
 
 ..  _Pragma_Source_File_Name_Project: