lib: banner purge + WHY-only comment sweep (rule 8)

Every // ---- section banner dies (132 -> 0): names carry the WHAT.
Narration deleted (filename restatements, run-with lines, what-the-
next-line-does); every ref/hare cite, task cite, divergence, ABI/
layout contract, and ownership qualifier kept (borrowed-view lines
restored where the sweep over-cut). Comment-only proven: all 442
walk-workdir .s and 32 import-probe .s byte-identical before/after;
libbyteid 56-roster all-ID.

lib/getopt/getopt.ww

@@ -403,8 +403,6 @@ export fn strerror(err: *error) str = {
 	return r;
 };
 
-// ---- help output --------------------------------------------------------
-//
 // ref/hare/getopt/getopts.ha:202-335.
 //
 // Divergences from Hare (all forced):
@@ -447,13 +445,11 @@ fn _printusage(
 ) (size | io.error) = {
 	let z: size = 0;
 
-	// "Usage: <name>"
 	match (fmt.fprint(out, "Usage:", name)) {
 	case let n: size => z += n;
 	case let e: io.error => return e;
 	};
 
-	// Optional auto-[-h] + flag cluster [-Xabc].
 	let startedflags: bool = false;
 	if (!hascmdh) {
 		match (fmt.fprint(out, " [-h")) {
@@ -485,7 +481,6 @@ fn _printusage(
 		};
 	};
 
-	// Parameter slots [-X <name>].
 	i = 0;
 	for (i < help.len) {
 		let p: *help = &help[i];
@@ -571,7 +566,6 @@ export fn printhelp(
 		return void;
 	};
 
-	// Print "name: summary\n\n" if help[0] is a CMD entry.
 	let p0: *help = &help[0];
 	if (p0.kind == helpkind.CMD) {
 		match (fmt.fprintfln(out, "{}: {}\n", name, p0.text)) {
@@ -593,13 +587,11 @@ export fn printhelp(
 	case let e: io.error => return e;
 	};
 
-	// Blank line between usage and option list.
 	match (fmt.fprint(out, "\n")) {
 	case let n: size => {};
 	case let e: io.error => return e;
 	};
 
-	// Auto -h line if not declared.
 	if (!hascmdh) {
 		match (fmt.fprintln(out, "-h: print this help text")) {
 		case let n: size => {};
@@ -607,7 +599,6 @@ export fn printhelp(
 		};
 	};
 
-	// Per-option lines.
 	let i: i32 = 0;
 	for (i < help.len) {
 		let p: *help = &help[i];