fix(glossy): use codepoints (not bytes!) in article code

Fixes [#18](#18)

glossy/src/gloss.typ

@@ -605,7 +605,7 @@
         // 1. create array of tuples with (lower [if ignore-case], entry)
         .map(e => { if ignore-case { (lower(e.short), e) } else { (e.short, e) } })
         // 2. sort the tuples (by first element then second)
-        .sorted(key: t => t.first())
+        .sorted() // NOTE: sorted() is NOT language-aware
         // 3. strip away the tuple's first element, leaving an array of entries
         .map(t => t.last())
 

glossy/src/utils.typ

@@ -203,15 +203,15 @@
 
   if is_acronym {
     // Use acronym rules
-    let first_char = upper_word.slice(0,1)
+    let first_char = upper_word.codepoints().slice(0,1).first()
     if acronym_vowels.contains(first_char) {
       "an"
     } else {
       "a"
     }
   } else {
     // Non-acronym rules
-    let first_char = lower_word.slice(0,1)
+    let first_char = lower_word.codepoints().slice(0,1).first()
 
     // Special cases for words matching a set of known 'silent h' prefixes
     let silent_h_words = (

glossy/tests/utf-handling/glossary.yml

@@ -0,0 +1,23 @@
+cab:
+  short: "cab"
+  long: "taxi cab"
+
+coo:
+  short: "COO"
+  long: "Chief Operations Officer"
+
+cuckoo:
+  short: "cuckoo"
+  long: "really crazy"
+
+delta:
+  short: "delta"
+  long: "difference between two values"
+
+dal:
+  short: "DAL"
+  long: "Delta Airlines"
+
+čr:
+  short: "ČR"
+  long: "Česká Republika"

glossy/tests/utf-handling/test.typ

@@ -0,0 +1,20 @@
+#import "/lib.typ":*
+
+#set text(lang: "cs", region: "CZ")
+
+#show: init-glossary.with(yaml("glossary.yml"))
+#glossary(ignore-case: true)
+
+#line(length: 20em)
+
+@čr
+
+@cab
+
+@coo
+
+@cuckoo
+
+@delta
+
+@dal