[hb-subset] Adjust --help-all formatting

Meh.

util/hb-subset.cc

@@ -853,7 +853,7 @@ subset_main_t::add_options ()
   {
     {"gids",		'g', 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_gids,
      "Specify glyph IDs or ranges to include in the subset.\n"
-     "                                                       "
+     "                                                        "
      "Use --gids-=... to subtract codepoints from the current set.", "list of glyph indices/ranges or *"},
     {"gids-",		0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_gids,			"Specify glyph IDs or ranges to remove from the subset", "list of glyph indices/ranges or *"},
     {"gids+",		0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_gids,			"Specify glyph IDs or ranges to include in the subset", "list of glyph indices/ranges or *"},
@@ -873,11 +873,11 @@ subset_main_t::add_options ()
     {"text-file",	0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_file_for<parse_text, false>,"Specify file to read text from", "filename"},
     {"unicodes",	'u', 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_unicodes,
      "Specify Unicode codepoints or ranges to include in the subset. Use * to include all codepoints.\n"
-     "                                                       "
+     "                                                        "
      "--unicodes-=... can be used to subtract codepoints from the current set.\n"
-     "                                                       "
+     "                                                        "
      "For example: --unicodes=* --unicodes-=41,42,43 would create a subset with all codepoints\n"
-     "                                                       "
+     "                                                        "
      "except for 41, 42, 43.",
      "list of hex numbers/ranges or *"},
     {"unicodes-",	0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_unicodes, "Specify Unicode codepoints or ranges to remove from the subset", "list of hex numbers/ranges or *"},
@@ -916,8 +916,9 @@ subset_main_t::add_options ()
     {"instance",	0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_instance,
      "(Partially|Fully) Instantiate a variable font. A location consists of the tag of a variation axis, followed by '=', followed by a\n"
      "number or the literal string 'drop'\n"
-     "                                                       "
+     "                                                        "
      "For example: --instance=\"wdth=100 wght=200\" or --instance=\"wdth=drop\"\n"
+     "                                                        "
      "Note: currently only fully instancing to the default location is supported\n",
      "list of comma separated axis-locations"},
 #endif