degesch: prefer British spelling in comments

Let's say the rest is in Oxford spelling, not sure about it.

degesch.c

@@ -1439,8 +1439,8 @@ enum formatter_item_type
 	FORMATTER_ITEM_END,                 ///< Sentinel value for arrays
 	FORMATTER_ITEM_TEXT,                ///< Text
 	FORMATTER_ITEM_ATTR,                ///< Formatting attributes
-	FORMATTER_ITEM_FG_COLOR,            ///< Foreground color
+	FORMATTER_ITEM_FG_COLOR,            ///< Foreground colour
-	FORMATTER_ITEM_BG_COLOR,            ///< Background color
+	FORMATTER_ITEM_BG_COLOR,            ///< Background colour
 	FORMATTER_ITEM_SIMPLE,              ///< Toggle mIRC formatting
 	FORMATTER_ITEM_IGNORE_ATTR          ///< Un/set attribute ignoration
 };
@@ -1449,7 +1449,7 @@ struct formatter_item
 {
 	enum formatter_item_type type : 16; ///< Type of this item
 	int attribute                 : 16; ///< Attribute ID
-	int color;                          ///< Color
+	int color;                          ///< Colour
 	char *text;                         ///< String
 };
 
@@ -2062,7 +2062,7 @@ struct app_context
 	struct poller_idle input_event;     ///< Pending input event
 	struct strv pending_input;          ///< Pending input lines
 
-	int *nick_palette;                  ///< A 256-color palette for nicknames
+	int *nick_palette;                  ///< A 256-colour palette for nicknames
 	size_t nick_palette_len;            ///< Number of entries in nick_palette
 
 	bool awaiting_mirc_escape;          ///< Awaiting a mIRC attribute escape
@@ -2607,13 +2607,13 @@ serialize_configuration (struct config_item *root, struct str *output)
 
 // --- Terminal output ---------------------------------------------------------
 
-/// Default color pair
+/// Default colour pair
 #define COLOR_DEFAULT -1
 
-/// Bright versions of the basic color set
+/// Bright versions of the basic colour set
 #define COLOR_BRIGHT(x) (COLOR_ ## x + 8)
 
-/// Builds a color pair for 256-color terminals with a 16-color backup value
+/// Builds a colour pair for 256-colour terminals with a 16-colour backup value
 #define COLOR_256(name, c256) \
 	(((COLOR_ ## name) & 0xFFFF) | (((c256) & 0xFFFF) << 16))
 
@@ -2757,7 +2757,7 @@ init_colors (struct app_context *ctx)
 // A little tool that tries to make the most of the terminal's capabilities
 // to set up text attributes.  It mostly targets just terminal emulators as that
 // is what people are using these days.  At least no stupid ncurses limits us
-// with color pairs.
+// with colour pairs.
 
 enum
 {
@@ -2830,12 +2830,12 @@ attr_printer_apply_named (struct attr_printer *self, int attribute)
 }
 
 // NOTE: commonly terminals have:
-//   8 colors (worst, bright fg with BOLD, bg sometimes with BLINK)
+//   8 colours (worst, bright fg often with BOLD, bg sometimes with BLINK)
-//   16 colors (okayish, we have the full basic range guaranteed)
+//   16 colours (okayish, we have the full basic range guaranteed)
-//   88 colors (the same plus a 4^3 RGB cube and a few shades of gray)
+//   88 colours (the same plus a 4^3 RGB cube and a few shades of grey)
-//   256 colors (best, like above but with a larger cube and more gray)
+//   256 colours (best, like above but with a larger cube and more grey)
 
-/// Interpolate from the 256-color palette to the 88-color one
+/// Interpolate from the 256-colour palette to the 88-colour one
 static int
 attr_printer_256_to_88 (int color)
 {
@@ -2843,7 +2843,7 @@ attr_printer_256_to_88 (int color)
 	if (color < 16)
 		return color;
 
-	// 24 -> 8 extra shades of gray
+	// 24 -> 8 extra shades of grey
 	if (color >= 232)
 		return 80 + (color - 232) / 3;
 
@@ -3073,8 +3073,8 @@ irc_to_utf8 (const char *text)
 //
 //   #a inserts named attributes (auto-resets)
 //   #r resets terminal attributes
-//   #c sets foreground color
+//   #c sets foreground colour
-//   #C sets background color
+//   #C sets background colour
 //
 // Modifiers:
 //    & free() the string argument after using it
@@ -3111,7 +3111,7 @@ enum
 	MIRC_L_BLUE, MIRC_L_PURPLE, MIRC_GRAY,   MIRC_L_GRAY,
 };
 
-// We use estimates from the 16 color terminal palette, or the 256 color cube,
+// We use estimates from the 16 colour terminal palette, or the 256 colour cube,
 // which is not always available.  The mIRC orange colour is only in the cube.
 
 static const int g_mirc_to_terminal[] =
@@ -3228,11 +3228,11 @@ formatter_parse_nick (struct formatter *self, const char *s)
 	if (color == COLOR_BLACK)
 		color = (uint16_t) -1;
 
-	// Use a color from the 256-color cube if available
+	// Use a colour from the 256-colour cube if available
 	color |= self->ctx->nick_palette[siphash_wrapper (nick,
 		strlen (nick)) % self->ctx->nick_palette_len] << 16;
 
-	// We always use the default color for ourselves
+	// We always use the default colour for ourselves
 	if (self->s && irc_is_this_us (self->s, nick))
 		color = -1;
 
@@ -3243,7 +3243,7 @@ formatter_parse_nick (struct formatter *self, const char *s)
 	FORMATTER_ADD_TEXT (self, x);
 	free (x);
 
-	// Need to reset the color afterwards
+	// Need to reset the colour afterwards
 	FORMATTER_ADD_ITEM (self, FG_COLOR, .color = -1);
 }
 
@@ -3386,8 +3386,8 @@ struct line_char_attrs
 {
 	int named;                          ///< Named attribute or -1
 	int text;                           ///< Text attributes
-	int fg;                             ///< Foreground color (-1 for default)
+	int fg;                             ///< Foreground colour (-1 for default)
-	int bg;                             ///< Background color (-1 for default)
+	int bg;                             ///< Background colour (-1 for default)
 };
 
 struct line_char
@@ -6063,7 +6063,7 @@ irc_is_highlight (struct server *s, const char *message)
 		return false;
 
 	// Strip formatting from the message so that it doesn't interfere
-	// with nickname detection (color sequences in particular)
+	// with nickname detection (colour sequences in particular)
 	struct formatter f = formatter_make (s->ctx, NULL);
 	formatter_parse_mirc (&f, message);