Add notifications.

tools/gen-emoji.py

@@ -26,7 +26,7 @@ just over half of those are the same gesture five more times; a grid of them is
 harder to look through, not more complete. Every base glyph is present, which
 is the same choice GTK's own emoji chooser, iOS and Slack all make.
 
-So is anything newer than MAX_VERSION. Colour emoji fonts trail Unicode by a
+So is anything newer than MAX_VERSION. Color emoji fonts trail Unicode by a
 year or two, and a glyph the font has never heard of draws as a hex-digit box —
 which in a picker reads as a bug rather than as a font that needs updating. At
 the time of writing, Noto Color Emoji could draw all but 7 of the E17.0
@@ -50,7 +50,7 @@ EMOJI_TEST = "https://unicode.org/Public/emoji/latest/emoji-test.txt"
 ANNOTATIONS = "https://raw.githubusercontent.com/unicode-org/cldr/main/common/annotations/en.xml"
 DERIVED = "https://raw.githubusercontent.com/unicode-org/cldr/main/common/annotationsDerived/en.xml"
 
-# Terms no data file will ever give you: what a glyph means to someone labelling
+# Terms no data file will ever give you: what a glyph means to someone labeling
 # a terminal tab. CLDR knows a rocket is a "space ship"; it does not know it is
 # what you reach for when the tab is a deploy.
 SYNONYMS = {
@@ -305,7 +305,7 @@ HEADER = '''//! Every emoji a tab can wear in place of its icon, and the search
 //! Unicode lists nearly twice this many fully-qualified sequences and the
 //! difference is almost entirely the same gesture in five tones, which makes a
 //! grid longer to look through without making it more complete. The version
-//! cutoff is there because colour emoji fonts trail Unicode, and a glyph the
+//! cutoff is there because color emoji fonts trail Unicode, and a glyph the
 //! font has never heard of draws as a hex-digit box; the generator's header
 //! explains how to raise it.
 //!