Stop naming specific commercial discs in the AACS and codec comments

The same scrub as the previous commit, over the files it did not reach:
the variant-MKB layout notes, the 2.1 segment index observations, the
PPS-revert regressions and the playlist-twin tiebreak.

Measurements keep their numbers — "a v70 `0x2d` body = 46_100*2 + 16"
is the useful part, and the title it came from never was.

src/aacs/segment.rs

@@ -25,7 +25,7 @@
 //!     u32 start_spn | u32 end_spn        (source-packet numbers, inclusive)
 //! ```
 //! `index` is the 1..32 forensic index tag, NOT a sequential segment id: measured
-//! on a retail 2.1 disc (Zombieland) it cycles 1,2,…,32,1,2,… across records in
+//! on a retail 2.1 disc it cycles 1,2,…,32,1,2,… across records in
 //! file order — 24 full cycles of 32 plus a final partial cycle of 24 = 792
 //! records. Source-packet numbers are the 192-byte BDAV packet index: byte offset
 //! = `spn * 192`. Each segment is ~2560 packets (~480 KB) = 80 aligned units,
@@ -334,7 +334,7 @@ mod tests {
 
     #[test]
     fn parses_real_disc_layout() {
-        // First three records observed on retail 2.1 (Zombieland): the variant
+        // First three records observed on retail 2.1: the variant
         // field counts 1,2,3,… (it wraps at 32 further into the table — see
         // `index_field_cycles_one_to_thirty_two`), segments are 2560 packets.
         let tbl = build_tbl(&[
@@ -396,7 +396,7 @@ mod tests {
 
     #[test]
     fn index_field_cycles_one_to_thirty_two() {
-        // Reality on Zombieland: field@4 is the index, cycling 1..=32 in file
+        // Reality on a retail 2.1 disc: field@4 is the index, cycling 1..=32 in file
         // order (NOT a sequential segment id). Reproduce one-and-a-bit cycles.
         let mut recs = Vec::new();
         let mut spn = 1000u32;

src/aacs/variant.rs

@@ -91,8 +91,8 @@ pub fn is_variant_mkb(records: &[MkbRecord]) -> bool {
 }
 
 /// Body of the `0x2d` record: the `VARIANTS` table followed by the trailing
-/// 16-byte `Kvn` Nonce. Measured `46_100*2 + 16 = 92_216` on Zombieland v70 and
-/// `92_220` on Stand By Me v70 — in both, the leading `body.len() - 16` bytes are
+/// 16-byte `Kvn` Nonce. Measured `46_100*2 + 16 = 92_216` on one v70 disc and
+/// `92_220` on another — in both, the leading `body.len() - 16` bytes are
 /// the big-endian `u16` `VARIANTS` table (one per subset-difference) and the last
 /// 16 bytes are the Nonce, with NO leading header. This does NOT hold the C used
 /// for `Kmp` — that is the per-slot block in `0x0c`
@@ -361,7 +361,7 @@ impl std::error::Error for MediaKeyVariantError {}
 /// Look up the per-slot `VARIANTS` value for the matched subset-difference slot,
 /// keyed by the same index that selected the cvalue ([`ProcessingKeyMatch::cvalue_index`]).
 ///
-/// LAYOUT (fixed against a real 2.1 variant MKB — Zombieland v70, `MKB_RO.inf`):
+/// LAYOUT (fixed against a real 2.1 variant MKB — a v70 `MKB_RO.inf`):
 /// the `0x2d` Encrypted-Media-Key-Variant-Data body is exactly
 /// `46_100*2 + 16 = 92_216` bytes, i.e. one **big-endian u16 `VARIANTS` entry per
 /// subset-difference slot** (1:1 with the `0x0c` variant cvalues and the `0x04`
@@ -378,7 +378,7 @@ fn variants_for_uv(records: &[MkbRecord], sd_slot_index: usize) -> Option<u16> {
     // The VARIANTS table is the leading bytes; the 16-byte Kvn Nonce is packed at
     // the TAIL (see [`variant_nonce`]). Bound the read to the table region so a
     // near-end slot can never read Nonce bytes as a VARIANTS entry. NO leading
-    // header (measured: Zombieland v70 `0x2d` body = 46_100*2 + 16 = 92_216).
+    // header (measured: a v70 `0x2d` body = 46_100*2 + 16 = 92_216).
     const NONCE: usize = 16;
     let table_len = body.len().checked_sub(NONCE)?;
     let off = sd_slot_index.checked_mul(2)?;

src/disc/mod.rs

@@ -2221,8 +2221,8 @@ impl Disc {
             .then_with(|| b.size_bytes.cmp(&a.size_bytes))
             // Tiebreak for equal-size twins: longer duration, then richer audio —
             // the same feature authored as sibling playlists (a full-audio main
-            // vs an audio-reduced twin, e.g. Fight Club's 00800 [DTS-HD MA + 13
-            // tracks] vs 00004 [stereo AC-3 only]). Prefer lossless-multichannel.
+            // vs an audio-reduced twin: 00800 [DTS-HD MA + 13 tracks] vs
+            // 00004 [stereo AC-3 only]). Prefer lossless-multichannel.
             .then_with(|| b.duration_secs.total_cmp(&a.duration_secs))
             .then_with(|| Self::audio_richness(b).cmp(&Self::audio_richness(a)))
     }

src/mux/codec/h264.rs

@@ -1168,7 +1168,7 @@ mod tests {
         );
     }
 
-    /// Regression (Fight Club bug, H.264 variant): PPS id 0 = body A (→ avcC),
+    /// Regression (the PPS revert bug, H.264 variant): PPS id 0 = body A (→ avcC),
     /// redefined to B, then switched BACK to A. A streaming decoder is on B; the
     /// revert to A == avcC must still be emitted in-band or the A-segment
     /// decodes against B.

src/mux/codec/hevc.rs

@@ -1708,7 +1708,7 @@ mod tests {
         );
     }
 
-    /// Regression (Fight Club UHD banded corruption): a stream redefines PPS
+    /// Regression (UHD banded corruption): a stream redefines PPS
     /// id 0 mid-title, then a later keyframe arrives WITHOUT repeating it (the
     /// source relies on the decoder retaining the redefinition — valid for a
     /// raw bitstream). An hvcC player re-applies the FIRST (codecPrivate) PPS
@@ -1856,7 +1856,7 @@ mod tests {
         );
     }
 
-    /// Regression (Fight Club UHD, the real bug): id 0 is body A (→ hvcC), then
+    /// Regression (a UHD title, the real bug): id 0 is body A (→ hvcC), then
     /// redefined to B, then the title switches BACK to A. A streaming decoder
     /// (hvcC at init, in-band updates only) is sitting on B; the switch back to
     /// A must be emitted IN-BAND even though A == codecPrivate, or the whole
@@ -2604,7 +2604,7 @@ mod tests {
         // PES4: back to PPS-A. Even though A == codecPrivate, the ACTIVE set is
         // B, so switching to A is a real change and MUST be emitted in-band — a
         // streaming decoder (hvcC at init, in-band updates only) is sitting on B
-        // and would otherwise never revert. (This is the Fight Club bug: the old
+        // and would otherwise never revert. (This is the PPS revert bug: the old
         // `== codecPrivate → strip` rule dropped exactly this revert.)
         let mut d = pps(0xAA);
         d.extend(slice());