fix: Use self.term_window.hline() and curses.ACS_HLINE for the separator line

Author: Neved4

glances/outputs/glances_curses.py

@@ -446,13 +446,24 @@ def separator_line(self, color='SEPARATOR'):
         self.line -= 1
         line_width = self.term_window.getmaxyx()[1] - self.column
         if self.line >= 0:
-            self.term_window.addnstr(
-                self.line,
-                self.column,
-                unicode_message('MEDIUM_LINE', self.args) * line_width,
-                line_width,
-                self.colors_list[color],
-            )
+            position = [self.line, self.column]
+            line_color = self.colors_list[color]
+
+            if not self.args.disable_unicode:
+                # Use curses.ACS_HLINE for the separator line
+                self.term_window.hline(
+                    *position,
+                    curses.ACS_HLINE,
+                    line_width,
+                    line_color,
+                )
+            else:
+                self.term_window.addnstr(
+                    *position,
+                    unicode_message('MEDIUM_LINE', self.args) * line_width,
+                    line_width,
+                    line_color,
+                )
 
     def __get_stat_display(self, stats, layer):
         """Return a dict of dict with all the stats display.