diff --git a/src/arabic.c b/src/arabic.c
index cb43b802e8..9bc1669196 100644
--- a/src/arabic.c
+++ b/src/arabic.c
@@ -24,7 +24,9 @@ static int  chg_c_a2s(int cur_c);
 static int  chg_c_a2i(int cur_c);
 static int  chg_c_a2m(int cur_c);
 static int  chg_c_a2f(int cur_c);
+#if 0
 static int  chg_c_i2m(int cur_c);
+#endif
 static int  chg_c_f2m(int cur_c);
 static int  chg_c_laa2i(int hid_c);
 static int  chg_c_laa2f(int hid_c);
@@ -418,7 +420,10 @@ chg_c_a2f(int cur_c)
 
 /*
  * Change shape - from Initial to Medial
+ * This code is unreachable, because for the relevant characters ARABIC_CHAR()
+ * is FALSE;
  */
+#if 0
     static int
 chg_c_i2m(int cur_c)
 {
@@ -450,6 +455,7 @@ chg_c_i2m(int cur_c)
     }
     return 0;
 }
+#endif
 
 
 /*
@@ -608,7 +614,11 @@ arabic_shape(
     else if (!shape_c || A_is_f(shape_c) || A_is_s(shape_c) || prev_laa)
 	curr_c = A_is_valid(next_c) ? chg_c_a2i(c) : chg_c_a2s(c);
     else if (A_is_valid(next_c))
+#if 0
 	curr_c = A_is_iso(c) ? chg_c_a2m(c) : chg_c_i2m(c);
+#else
+	curr_c = A_is_iso(c) ? chg_c_a2m(c) : 0;
+#endif
     else if (A_is_valid(prev_c))
 	curr_c = chg_c_a2f(c);
     else
diff --git a/src/testdir/test_arabic.vim b/src/testdir/test_arabic.vim
index 9a16833a4c..e62b022632 100644
--- a/src/testdir/test_arabic.vim
+++ b/src/testdir/test_arabic.vim
@@ -1,4 +1,6 @@
 " Simplistic testing of Arabic mode.
+" NOTE: This just checks if the code works. If you know Arabic please add
+" functional tests that check the shaping works with real text.
 
 if !has('arabic') || !has('multi_byte')
   finish
@@ -417,7 +419,7 @@ func Test_shape_isolated()
   bwipe!
 endfunc
 
-func Test_shape_medial()
+func Test_shape_iso_to_medial()
   new
   set arabicshape
 
@@ -470,3 +472,142 @@ func Test_shape_medial()
   bwipe!
 endfunc
 
+func Test_shape_final()
+  new
+  set arabicshape
+
+  " Shaping arabic {testchar} arabic   Tests chg_c_a2f().
+  " pair[0] = testchar,  pair[1] = current-result, pair[2] = previous-result
+  for pair in [[s:a_HAMZA, s:a_s_HAMZA, s:a_s_BEH],
+	\[s:a_ALEF_MADDA, s:a_f_ALEF_MADDA, s:a_i_BEH],
+	\[s:a_ALEF_HAMZA_ABOVE, s:a_f_ALEF_HAMZA_ABOVE, s:a_i_BEH],
+	\[s:a_WAW_HAMZA, s:a_f_WAW_HAMZA, s:a_i_BEH],
+	\[s:a_ALEF_HAMZA_BELOW, s:a_f_ALEF_HAMZA_BELOW, s:a_i_BEH],
+	\[s:a_YEH_HAMZA, s:a_f_YEH_HAMZA, s:a_i_BEH],
+	\[s:a_ALEF, s:a_f_ALEF, s:a_i_BEH],
+	\[s:a_BEH, s:a_f_BEH, s:a_i_BEH],
+	\[s:a_TEH_MARBUTA, s:a_f_TEH_MARBUTA, s:a_i_BEH],
+	\[s:a_TEH, s:a_f_TEH, s:a_i_BEH],
+	\[s:a_THEH, s:a_f_THEH, s:a_i_BEH],
+	\[s:a_JEEM, s:a_f_JEEM, s:a_i_BEH],
+	\[s:a_HAH, s:a_f_HAH, s:a_i_BEH],
+	\[s:a_KHAH, s:a_f_KHAH, s:a_i_BEH],
+	\[s:a_DAL, s:a_f_DAL, s:a_i_BEH],
+	\[s:a_THAL, s:a_f_THAL, s:a_i_BEH],
+	\[s:a_REH, s:a_f_REH, s:a_i_BEH],
+	\[s:a_ZAIN, s:a_f_ZAIN, s:a_i_BEH],
+	\[s:a_SEEN, s:a_f_SEEN, s:a_i_BEH],
+	\[s:a_SHEEN, s:a_f_SHEEN, s:a_i_BEH],
+	\[s:a_SAD, s:a_f_SAD, s:a_i_BEH],
+	\[s:a_DAD, s:a_f_DAD, s:a_i_BEH],
+	\[s:a_TAH, s:a_f_TAH, s:a_i_BEH],
+	\[s:a_ZAH, s:a_f_ZAH, s:a_i_BEH],
+	\[s:a_AIN, s:a_f_AIN, s:a_i_BEH],
+	\[s:a_GHAIN, s:a_f_GHAIN, s:a_i_BEH],
+	\[s:a_TATWEEL, s:a_TATWEEL, s:a_i_BEH],
+	\[s:a_FEH, s:a_f_FEH, s:a_i_BEH],
+	\[s:a_QAF, s:a_f_QAF, s:a_i_BEH],
+	\[s:a_KAF, s:a_f_KAF, s:a_i_BEH],
+	\[s:a_LAM, s:a_f_LAM, s:a_i_BEH],
+	\[s:a_MEEM, s:a_f_MEEM, s:a_i_BEH],
+	\[s:a_NOON, s:a_f_NOON, s:a_i_BEH],
+	\[s:a_HEH, s:a_f_HEH, s:a_i_BEH],
+	\[s:a_WAW, s:a_f_WAW, s:a_i_BEH],
+	\[s:a_ALEF_MAKSURA, s:a_f_ALEF_MAKSURA, s:a_i_BEH],
+	\[s:a_YEH, s:a_f_YEH, s:a_i_BEH],
+	\ ]
+    call setline(1, ' ' . pair[0] . s:a_BEH)
+    call assert_equal([' ' . pair[1] . pair[2]], ScreenLines(1, 3))
+  endfor
+
+  set arabicshape&
+  bwipe!
+endfunc
+
+func Test_shape_final_to_medial()
+  new
+  set arabicshape
+
+  " Shaping arabic {testchar} arabic   Tests chg_c_f2m().
+  " This does not test much...
+  " pair[0] = testchar,  pair[1] = current-result
+  for pair in [[s:a_f_YEH_HAMZA, s:a_f_BEH],
+	\[s:a_f_WAW_HAMZA, s:a_s_BEH],
+	\[s:a_f_ALEF, s:a_s_BEH],
+	\[s:a_f_TEH_MARBUTA, s:a_s_BEH],
+	\[s:a_f_DAL, s:a_s_BEH],
+	\[s:a_f_THAL, s:a_s_BEH],
+	\[s:a_f_REH, s:a_s_BEH],
+	\[s:a_f_ZAIN, s:a_s_BEH],
+	\[s:a_f_WAW, s:a_s_BEH],
+	\[s:a_f_ALEF_MAKSURA, s:a_s_BEH],
+	\[s:a_f_BEH, s:a_f_BEH],
+	\[s:a_f_TEH, s:a_f_BEH],
+	\[s:a_f_THEH, s:a_f_BEH],
+	\[s:a_f_JEEM, s:a_f_BEH],
+	\[s:a_f_HAH, s:a_f_BEH],
+	\[s:a_f_KHAH, s:a_f_BEH],
+	\[s:a_f_SEEN, s:a_f_BEH],
+	\[s:a_f_SHEEN, s:a_f_BEH],
+	\[s:a_f_SAD, s:a_f_BEH],
+	\[s:a_f_DAD, s:a_f_BEH],
+	\[s:a_f_TAH, s:a_f_BEH],
+	\[s:a_f_ZAH, s:a_f_BEH],
+	\[s:a_f_AIN, s:a_f_BEH],
+	\[s:a_f_GHAIN, s:a_f_BEH],
+	\[s:a_f_FEH, s:a_f_BEH],
+	\[s:a_f_QAF, s:a_f_BEH],
+	\[s:a_f_KAF, s:a_f_BEH],
+	\[s:a_f_LAM, s:a_f_BEH],
+	\[s:a_f_MEEM, s:a_f_BEH],
+	\[s:a_f_NOON, s:a_f_BEH],
+	\[s:a_f_HEH, s:a_f_BEH],
+	\[s:a_f_YEH, s:a_f_BEH],
+	\ ]
+    call setline(1, ' ' . s:a_BEH . pair[0])
+    call assert_equal([' ' . pair[1] . pair[0]], ScreenLines(1, 3))
+  endfor
+
+  set arabicshape&
+  bwipe!
+endfunc
+
+func Test_shape_combination_final()
+  new
+  set arabicshape
+
+  " Shaping arabic {testchar} arabic   Tests chg_c_laa2f().
+  " pair[0] = testchar,  pair[1] = current-result
+  for pair in [[s:a_ALEF_MADDA, s:a_f_LAM_ALEF_MADDA_ABOVE],
+	\ [s:a_ALEF_HAMZA_ABOVE, s:a_f_LAM_ALEF_HAMZA_ABOVE],
+	\ [s:a_ALEF_HAMZA_BELOW, s:a_f_LAM_ALEF_HAMZA_BELOW],
+	\ [s:a_ALEF, s:a_f_LAM_ALEF],
+	\ ]
+    " The test char is a composing char, put on s:a_LAM.
+    call setline(1, ' ' . s:a_LAM . pair[0] . s:a_BEH)
+    call assert_equal([' ' . pair[1] . s:a_i_BEH], ScreenLines(1, 3))
+  endfor
+
+  set arabicshape&
+  bwipe!
+endfunc
+
+func Test_shape_combination_isolated()
+  new
+  set arabicshape
+
+  " Shaping arabic {testchar} arabic   Tests chg_c_laa2i().
+  " pair[0] = testchar,  pair[1] = current-result
+  for pair in [[s:a_ALEF_MADDA, s:a_s_LAM_ALEF_MADDA_ABOVE],
+	\ [s:a_ALEF_HAMZA_ABOVE, s:a_s_LAM_ALEF_HAMZA_ABOVE],
+	\ [s:a_ALEF_HAMZA_BELOW, s:a_s_LAM_ALEF_HAMZA_BELOW],
+	\ [s:a_ALEF, s:a_s_LAM_ALEF],
+	\ ]
+    " The test char is a composing char, put on s:a_LAM.
+    call setline(1, ' ' . s:a_LAM . pair[0] . ' ')
+    call assert_equal([' ' . pair[1] . ' '], ScreenLines(1, 3))
+  endfor
+
+  set arabicshape&
+  bwipe!
+endfunc
diff --git a/src/testdir/test_fold.vim b/src/testdir/test_fold.vim
index 46c54e8614..a5b47d899b 100644
--- a/src/testdir/test_fold.vim
+++ b/src/testdir/test_fold.vim
@@ -9,8 +9,8 @@ func! Test_address_fold()
   call setline(1, ['int FuncName() {/*{{{*/', 1, 2, 3, 4, 5, '}/*}}}*/',
 	      \ 'after fold 1', 'after fold 2', 'after fold 3'])
   setl fen fdm=marker
-  " The next ccommands should all copy the same part of the buffer,
-  " regardless of the adressing type, since the part to be copied
+  " The next commands should all copy the same part of the buffer,
+  " regardless of the addressing type, since the part to be copied
   " is folded away
   :1y
   call assert_equal(['int FuncName() {/*{{{*/', '1', '2', '3', '4', '5', '}/*}}}*/'], getreg(0,1,1))
@@ -360,3 +360,56 @@ func! Test_move_folds_around_indent()
   call assert_equal([0, 1, 1, 1, 1, 0, 0, 0, 1, 1], map(range(1, line('$')), 'foldlevel(v:val)'))
   bw!
 endfunc
+
+func Test_folddoopen_folddoclosed()
+  new
+  call setline(1, range(1, 9))
+  set foldmethod=manual
+  1,3 fold
+  6,8 fold
+
+  " Test without range.
+  folddoopen   s/$/o/
+  folddoclosed s/$/c/
+  call assert_equal(['1c', '2c', '3c',
+  \                  '4o', '5o',
+  \                  '6c', '7c', '8c',
+  \                  '9o'], getline(1, '$'))
+
+  " Test with range.
+  call setline(1, range(1, 9))
+  1,8 folddoopen   s/$/o/
+  4,$ folddoclosed s/$/c/
+  call assert_equal(['1',  '2', '3',
+  \                  '4o', '5o',
+  \                  '6c', '7c', '8c',
+  \                  '9'], getline(1, '$'))
+
+  set foldmethod&
+  bw!
+endfunc
+
+func Test_fold_error()
+  new
+  call setline(1, [1, 2])
+
+  for fm in ['indent', 'expr', 'syntax', 'diff']
+    exe 'set foldmethod=' . fm
+    call assert_fails('norm zf', 'E350:')
+    call assert_fails('norm zd', 'E351:')
+    call assert_fails('norm zE', 'E352:')
+  endfor
+
+  set foldmethod=manual
+  call assert_fails('norm zd', 'E490:')
+  call assert_fails('norm zo', 'E490:')
+  call assert_fails('3fold',   'E16:')
+
+  set foldmethod=marker
+  set nomodifiable
+  call assert_fails('1,2fold', 'E21:')
+
+  set modifiable&
+  set foldmethod&
+  bw!
+endfunc
diff --git a/src/version.c b/src/version.c
index f90e60f30d..c8877de395 100644
--- a/src/version.c
+++ b/src/version.c
@@ -779,6 +779,10 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    497,
+/**/
+    496,
 /**/
     495,
 /**/