font-patcher: Fix Monofur 'Nerd Font Mono' too wide

[why]
Although Monofur is monospaced it has one glyph (hyphen) that is
slightly wider than all others. This results in a Monospaced font that
is slightly too wide.

[how]
Ignore the hyphen width.

[note]
Additionally improve (commented out) debug code (shows now hex
codepoint).

Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>

font-patcher

@@ -986,6 +986,7 @@ class font_patcher:
                     0x132, 0x133, # IJ, ij (in Overpass Mono)
                     0x022, 0x027, 0x060, # Single and double quotes in Inconsolata LGC
                     0x0D0, 0x10F, 0x110, 0x111, 0x127, 0x13E, 0x140, 0x165, # Eth and others with stroke or caron in RobotoMono
+                    0x02D, # hyphen for Monofur
                     ]:
                 continue # ignore special characters like '1/4' etc and some specifics
             try:
@@ -999,10 +1000,10 @@ class font_patcher:
                     print("Warning: Extended glyphs wider than basic glyphs, results might be useless\n  {}".format(
                         report_advance_widths(self.sourceFont)))
                     warned = True
-                # print("New MAXWIDTH-A {} {} -> {} {}".format(glyph, self.sourceFont[glyph].width, self.font_dim['width'], xmax))
+                # print("New MAXWIDTH-A {:X} {} -> {} {}".format(glyph, self.sourceFont[glyph].width, self.font_dim['width'], xmax))
             if xmax > self.font_dim['xmax']:
                 self.font_dim['xmax'] = xmax
-                # print("New MAXWIDTH-B {} {} -> {} {}".format(glyph, self.sourceFont[glyph].width, self.font_dim['width'], xmax))
+                # print("New MAXWIDTH-B {:X} {} -> {} {}".format(glyph, self.sourceFont[glyph].width, self.font_dim['width'], xmax))
         # print("FINAL", self.font_dim)