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_test.ww

@@ -1,6 +1,3 @@
-// getopttest — exercises lib/getopt. Run with
-// `out/bin/ww run lib/getopt/getopttest.ww`.
-//
 // Every @test enumerates parallel `[N]T` arrays of inputs and
 // expectations, then iterates one body across them. Parallel arrays
 // (rather than `[N]struct{...}`) sidestep the cstage cgen's chained
@@ -36,8 +33,6 @@ fn streq(a: str, b: str) bool = {
 	return true;
 };
 
-// ---- flagcluster: -Fahs files.txt → 4 flags + 1 arg --------------------
-
 @test fn flagcluster() void = {
 	let helps: [5]getopt.help;
 	getopt.cmdhelp(&helps[0], "list files");
@@ -82,8 +77,6 @@ fn streq(a: str, b: str) bool = {
 	getopt.finish(&cmd);
 };
 
-// ---- paramflag: glued + separated arguments ----------------------------
-
 @test fn paramflag() void = {
 	let helps: [3]getopt.help;
 	getopt.cmdhelp(&helps[0], "edit");
@@ -125,8 +118,6 @@ fn streq(a: str, b: str) bool = {
 	getopt.finish(&cmd);
 };
 
-// ---- separator: -- ends option processing ------------------------------
-//
 // `--` in three positions: after a flag, immediately after argv[0],
 // and at the tail with nothing trailing. Flat-packed argv per
 // errortable's pattern; rows expect distinct (optslen, argslen,
@@ -176,8 +167,6 @@ fn streq(a: str, b: str) bool = {
 	};
 };
 
-// ---- repeatedflag: -vvv → 3 v opts -------------------------------------
-
 @test fn repeatedflag() void = {
 	let helps: [2]getopt.help;
 	getopt.cmdhelp(&helps[0], "verbose count");
@@ -207,8 +196,6 @@ fn streq(a: str, b: str) bool = {
 	getopt.finish(&cmd);
 };
 
-// ---- baredash: "-" alone is a positional --------------------------------
-//
 // Bare `-` in three positions: trailing after a flag, leading (which
 // halts option scanning), and followed by what looks like a flag
 // (also halts — first non-flag wins).
@@ -257,8 +244,6 @@ fn streq(a: str, b: str) bool = {
 	};
 };
 
-// ---- errortable: unknownopt + requiresarg variants ---------------------
-//
 // Parallel arrays per row: argv flat-packed into `srcs`, with `argo`
 // the offset and `argn` the count for each row.
 @test fn errortable() void = {
@@ -306,8 +291,6 @@ fn streq(a: str, b: str) bool = {
 	};
 };
 
-// ---- strerrortext: render both error kinds -----------------------------
-//
 // Parallel rows over (kind, flag, name) → expected message. `kind`
 // rides as i32 because the errorkind enum doesn't yet index an
 // array element directly.
@@ -332,8 +315,6 @@ fn streq(a: str, b: str) bool = {
 	};
 };
 
-// ---- nooptionsbare: argv with only program name + positionals ----------
-//
 // Positional-only argv at three lengths: two positionals, one
 // positional, and the program-name-only edge.
 @test fn nooptionsbare() void = {
@@ -380,8 +361,6 @@ fn streq(a: str, b: str) bool = {
 	};
 };
 
-// ---- printusage_cases: table of width-measure paths --------------------
-//
 // ref/hare/getopt/getopts.ha:202-265.
 // Row 0: short line (≤72) — auto-[-h] + FLAG cluster, no wrap.
 // Row 1: long line (>72) — PARAM slots each prefixed with \n\t.
@@ -434,8 +413,6 @@ fn streq(a: str, b: str) bool = {
 	};
 };
 
-// ---- optionsizepin: option is 32B, not 24B -----------------------------
-//
 // tryparse/finish free the parsed-option array at `cap * size(option)`.
 // option = rune (4) + pad (4) + str (24, #1/Phase 3) = 32B. A hardcoded
 // `24u64` here was an 8-byte-per-element under-free; pinning the size
@@ -445,8 +422,6 @@ fn streq(a: str, b: str) bool = {
 	assert(!(size(getopt.option) != 32));
 };
 
-// ---- freeroundtrip: parse → finish over {0, 1, several} options --------
-//
 // Exercises the free path at three distinct cap values so the
 // `cap * size(option)` free in [[finish]] runs for an empty, single,
 // and multi-element option array. The under-free is not directly
@@ -493,8 +468,6 @@ fn streq(a: str, b: str) bool = {
 	};
 };
 
-// ---- printhelp_cases: table of help-output paths ----------------------
-//
 // ref/hare/getopt/getopts.ha:281-314.
 // Row 0: empty help slice → early return, no output.
 // Row 1: full help (CMD+FLAG+PARAM+CMD) → summary + usage + option list.