Problem with diff

Hi.

I have one "magick" file (in attachment).
I commit this file to repository. I add line
"/**/"
into end of file. And again I commit the file to repository.

When i invoke "svn diff -r n:m kadr.polon.p" i recive

in Subversion 1.6
Index: kadr.polon.p
===================================================================
--- kadr.polon.p (revision 7)
+++ kadr.polon.p (revision 8)
@@ -463,3 +463,5 @@
   IF vIlosc = (pStart + pIlosc - 1) then leave Global_loop.
END.
{ws_i/log.i}
+
+/**/

in Subversion 1.7
Index: kadr.polon.p
===================================================================
--- kadr.polon.p (revision 7)
+++ kadr.polon.p (revision 8)
@@ -460,6 +460,8 @@
    EMPTY TEMP-TABLE tt_tytnauk.
    EMPTY TEMP-TABLE tt_stnauk.
    pOstatni = vIlosc.
+ IF vIlosc = (pStart + pIlosc - 1) then leave Global_loop.
+END.
    IF vIlosc = (pStart + pIlosc - 1) then leave Global_loop.
 END.
 {ws_i/log.i}

When i change last line from "/**/" to "some new line" svn diff display this

1.6
Index: kadr.polon.p
===================================================================
--- kadr.polon.p (revision 8)
+++ kadr.polon.p (revision 9)
@@ -464,4 +464,4 @@
END.
{ws_i/log.i}

-/**/
\ No newline at end of file
+some new line
\ No newline at end of file

1.7
Index: kadr.polon.p
===================================================================
--- kadr.polon.p (revision 8)
+++ kadr.polon.p (revision 9)
@@ -461,7 +461,7 @@
    EMPTY TEMP-TABLE tt_stnauk.
    pOstatni = vIlosc.
    IF vIlosc = (pStart + pIlosc - 1) then leave Global_loop.
-END.
+END.
 {ws_i/log.i}

 /**/
\ No newline at end of file

Best regards
Adam Miazga