patch 8.2.4928: various white space and cosmetic mistakes

Problem:    Various white space and cosmetic mistakes.
Solution:   Change spaces to tabs, improve comments.

src/digraph.c

@@ -2339,6 +2339,7 @@ f_digraph_getlist(typval_T *argvars, typval_T *rettv)
     {
 	int	    error = FALSE;
 	varnumber_T flag = tv_get_number_chk(&argvars[0], &error);
+
 	if (error)
 	    return;
 	flag_list_all = flag ? TRUE : FALSE;

src/edit.c

@@ -3839,8 +3839,7 @@ ins_insert(int replaceState)
 #ifdef FEAT_EVAL
     set_vim_var_string(VV_INSERTMODE,
 		   (char_u *)((State & REPLACE_FLAG) ? "i"
-		          : replaceState == MODE_VREPLACE ? "v"
+			    : replaceState == MODE_VREPLACE ? "v" : "r"), 1);
-						     : "r"), 1);
 #endif
     ins_apply_autocmds(EVENT_INSERTCHANGE);
     if (State & REPLACE_FLAG)

src/evalwindow.c

@@ -155,6 +155,8 @@ win_findbuf(typval_T *argvars, list_T *list)
 
 /*
  * Find window specified by "vp" in tabpage "tp".
+ * Returns current window if "vp" is number zero.
+ * Returns NULL if not found.
  */
     win_T *
 find_win_by_nr(

src/misc1.c

@@ -575,7 +575,8 @@ check_status(buf_T *buf)
 }
 
 /*
- * Ask for a reply from the user, a 'y' or a 'n'.
+ * Ask for a reply from the user, a 'y' or a 'n', with prompt "str" (which
+ * should have been translated already).
  * No other characters are accepted, the message is repeated until a valid
  * reply is entered or CTRL-C is hit.
  * If direct is TRUE, don't use vgetc() but ui_inchar(), don't get characters

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4928,
 /**/
     4927,
 /**/

src/vim9compile.c

@@ -1041,7 +1041,7 @@ compile_all_expr_in_str(char_u *str, int evalstr, cctx_T *cctx)
 	// Skip the opening {.
 	block_start = skipwhite(p + 1);
 	block_end = block_start;
-	if (*block_start != NUL &&skip_expr(&block_end, NULL) == FAIL)
+	if (*block_start != NUL && skip_expr(&block_end, NULL) == FAIL)
 	    return FAIL;
 	block_end = skipwhite(block_end);
 	// The block must be closed by a }.