patch 9.0.0131: virtual text with Tab is not displayed correctly

Problem:    Virtual text with Tab is not displayed correctly.
Solution:   Change any Tab to a space.
diff --git a/src/testdir/test_textprop.vim b/src/testdir/test_textprop.vim
index 2a74dc7..832343d 100644
--- a/src/testdir/test_textprop.vim
+++ b/src/testdir/test_textprop.vim
@@ -2197,7 +2197,7 @@
       call prop_type_add('otherprop', #{highlight: 'Search'})
       call prop_type_add('moreprop', #{highlight: 'DiffAdd'})
       call prop_add(1, 18, #{type: 'someprop', text: 'SOME '})
-      call prop_add(1, 38, #{type: 'otherprop', text: 'OTHER '})
+      call prop_add(1, 38, #{type: 'otherprop', text: "OTHER\t"})
       call prop_add(1, 69, #{type: 'moreprop', text: 'MORE '})
       redraw
       normal $
@@ -2222,7 +2222,7 @@
       call prop_type_add('afterprop', #{highlight: 'Search'})
       call prop_type_add('belowprop', #{highlight: 'DiffAdd'})
       call prop_add(1, 0, #{type: 'rightprop', text: ' RIGHT ', text_align: 'right'})
-      call prop_add(1, 0, #{type: 'afterprop', text: ' AFTER ', text_align: 'after'})
+      call prop_add(1, 0, #{type: 'afterprop', text: "\tAFTER\t", text_align: 'after'})
       call prop_add(1, 0, #{type: 'belowprop', text: ' BELOW ', text_align: 'below'})
 
       call setline(2, 'Last line.')
diff --git a/src/textprop.c b/src/textprop.c
index f544a3c..6fefc6d 100644
--- a/src/textprop.c
+++ b/src/textprop.c
@@ -226,7 +226,8 @@
 
     if (text != NULL)
     {
-	garray_T *gap = &buf->b_textprop_text;
+	garray_T    *gap = &buf->b_textprop_text;
+	char_u	    *p;
 
 	// double check we got the right ID
 	if (-id - 1 != gap->ga_len)
@@ -236,6 +237,11 @@
 	if (ga_grow(gap, 1) == FAIL)
 	    goto theend;
 	((char_u **)gap->ga_data)[gap->ga_len++] = text;
+
+	// change any Tab to a Space to make it simpler to compute the size
+	for (p = text; *p != NUL; MB_PTR_ADV(p))
+	    if (*p == TAB)
+		*p = ' ';
 	text = NULL;
     }
 
diff --git a/src/version.c b/src/version.c
index 6a8ad9b..09ac434 100644
--- a/src/version.c
+++ b/src/version.c
@@ -736,6 +736,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    131,
+/**/
     130,
 /**/
     129,