Minor reformatting.

From-SVN: r177106

gcc/ada/sem_attr.adb

@@ -2064,7 +2064,7 @@ package body Sem_Attr is
       end if;
 
       --  In SPARK or ALFA, attributes of private types are only allowed if
-      --  the full type declaration is visible
+      --  the full type declaration is visible.
 
       if Formal_Verification_Mode
         and then Comes_From_Source (Original_Node (N))

gcc/ada/sem_res.adb

@@ -7613,8 +7613,8 @@ package body Sem_Res is
               ("string operand for concatenation should be a literal", N);
          end if;
 
-         --  Do not issue error on an operand that is neither a character nor
-         --  a string, as the error is issued in Resolve_Op_Concat.
+      --  Do not issue error on an operand that is neither a character nor a
+      --  string, as the error is issued in Resolve_Op_Concat.
 
       else
          null;