Wrap CLDR-derived time-zone ID tables to within a 100-column margin

Ugly display in code-review bugged me ...

Change-Id: If9243907973cad49f1a5c8d78ff23c14fab2d4b4
Reviewed-by: Ievgenii Meshcheriakov <ievgenii.meshcheriakov@qt.io>

util/locale_database/cldr2qtimezone.py

@@ -240,7 +240,8 @@ class ByteArrayData:
 
     def write(self, out, name):
         out(f'\nstatic constexpr char {name}[] = {{\n')
-        out(wrap_list(self.data))
+        out(wrap_list(self.data, 16)) # 16 == 100 // len('0xhh, ')
+        # Will over-spill 100-col if some 4-digit hex show up, but none do (yet).
         out('\n};\n')
 
 class ZoneIdWriter (SourceFileEditor):

util/locale_database/localetools.py

@@ -41,12 +41,12 @@ def unicode2hex(s):
             lst.append(hex(v))
     return lst
 
-def wrap_list(lst):
+def wrap_list(lst, perline=20):
     def split(lst, size):
         while lst:
             head, lst = lst[:size], lst[size:]
             yield head
-    return ",\n".join(", ".join(x) for x in split(lst, 20))
+    return ",\n".join(", ".join(x) for x in split(lst, perline))
 
 
 @contextmanager