refactor: follow style guide

- reduce variable scope
- prefer initialization over declaration and assignment

src/nvim/plines.c

@@ -167,9 +167,7 @@ int lbr_chartabsize(chartabsize_T *cts)
 /// @return The number of characters take up on the screen.
 int lbr_chartabsize_adv(chartabsize_T *cts)
 {
-  int retval;
-
-  retval = lbr_chartabsize(cts);
+  int retval = lbr_chartabsize(cts);
   MB_PTR_ADV(cts->cts_ptr);
   return retval;
 }
@@ -399,14 +397,13 @@ static int win_nolbr_chartabsize(chartabsize_T *cts, int *headp)
   win_T *wp = cts->cts_win;
   char *s = cts->cts_ptr;
   colnr_T col = cts->cts_vcol;
-  int n;
 
   if ((*s == TAB) && (!wp->w_p_list || wp->w_p_lcs_chars.tab1)) {
     return tabstop_padding(col,
                            wp->w_buffer->b_p_ts,
                            wp->w_buffer->b_p_vts_array);
   }
-  n = ptr2cells(s);
+  int n = ptr2cells(s);
 
   // Add one cell for a double-width character in the last column of the
   // window, displayed with a ">".