docs(fonts): say which rows the coverage test pins by name

The table's own preamble promised the test holds every row "to those
exact families". It holds the single-family rows that way; the wider ones
it holds to a count, which is a weaker claim and the one worth stating,
since a reader deciding whether to trust a row deserves to know which
kind it is.

The Greek constant the wide rows used before they moved to a letters-only
sweep is unreferenced now, so it goes.

Author: DemchaAV

fonts/README.md

@@ -49,8 +49,10 @@ in; four carry the whole block, including the extended letters the Central Asian
 Caucasian languages need. Greek is the modern alphabet rather than its Unicode block,
 whose archaic and Coptic letters no text face carries. Everything here is measured against
 the shipped binaries rather than against what a family is known for. (The standard-14 are
-WinAnsi and carry none of these scripts.) `BundledScriptCoverageTest` holds every row to those exact families, so
-this table fails a build rather than going quietly stale.
+WinAnsi and carry none of these scripts.) `BundledScriptCoverageTest` holds this table to the binaries: the single-family rows to
+those exact families, and the wider rows to their counts — so changing the bundled set
+fails a build and names the row to re-measure, rather than leaving the table to go quietly
+stale.
 
 | Script | Families that cover it | How many |
 | --- | --- | --- |

render-pdf/src/test/java/com/demcha/compose/document/backend/fixed/pdf/BundledScriptCoverageTest.java

@@ -121,16 +121,6 @@ void theWiderLatinAndGreekAndCyrillicRowsMatchTheirCounts() {
             0x1EA1, 0x1EA3, 0x1EA5, 0x1EAF, 0x1EBF, 0x1EC7, 0x1ED1,
             0x1EDD, 0x1EE7, 0x1EF1, 0x0102, 0x0110, 0x01A0, 0x01AF};
 
-    private static final int[] GREEK = greekLetters();
-
-    private static int[] greekLetters() {
-        // U+0391..U+03C9 with U+03A2 removed: it is unassigned, so no font carries it and
-        // a plain range sweep would report every Greek family as incomplete.
-        return java.util.stream.IntStream.rangeClosed(0x0391, 0x03C9)
-                .filter(codePoint -> codePoint != 0x03A2)
-                .toArray();
-    }
-
     private static List<FontName> familiesCovering(int first, int last) {
         return FAMILIES.stream()
                 .filter(family -> covers(family, first, last))