A quoted word that isn't a file name; split parts with two digits

From the re-index's single-file releases:
- A quoted text without an extension ("My \"Official\" remaining set's
  of Inna … 025.jpg [25/74]", "… lr140x16.jpg ( file 046 of 922)
  \"yEnc\"", "\"Dr. Lust\" - … - [12/21] - Ed_DRL_VDR_LM.part09.rar") was
  the file name, the real one stayed in the subject: every file a release.
  It gives way to a file name with an extension beside it
  (nameBesideQuotes); random quoted names with none beside keep theirs.
- Split parts numbered with two digits ("Admiral.EP05.2008.720p.Rus.
  HDCLUB.mkv.21", a.b.movies.divx.russian) share their stem, as .001.
Both implementations; tests; fixtures identical.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

edge/src/names.rs

@@ -36,7 +36,7 @@ static SUFFIXES: LazyLock<Vec<(Regex, &'static str)>> = LazyLock::new(|| {
         (re(r"(?i)\.7z(\.[0-9]{3})?$"), ""),
         (re(r"(?i)\.zip(\.[0-9]{3})?$"), ""),
         // JS: (?<=\.(7z|…))\.\d{3}$ — no lookbehind here, so the extension is matched and put back.
-        (re(r"(?i)(\.(?:7z|zip|rar|tar|mkv|mp4|avi|m4v|ts|m2ts|iso|img|bin|vob))\.[0-9]{3}$"), "$1"),
+        (re(r"(?i)(\.(?:7z|zip|rar|tar|mkv|mp4|avi|m4v|ts|m2ts|iso|img|bin|vob))\.[0-9]{2,3}$"), "$1"),
         (re(r"(?i)\.(nfo|sfv|nzb|srr|srs|txt|jpg|png|md5|sha1|srt|sub|idx|ass|ssa|m3u|m3u8|cue|log)$"), ""),
         (re(r"(?i)\.tar$"), ""),
         (re(r"(?i)\.(zst|gz|xz|bz2)$"), ""),
@@ -114,6 +114,13 @@ fn strip_three_digits(s: &[u8]) -> Option<usize> {
     (n >= 4 && s[n - 4] == b'.' && s[n - 3..].iter().all(u8::is_ascii_digit)).then(|| n - 4)
 }
 
+/// \.\d{2,3}$: where a split volume's number starts (its dot).
+fn strip_volume_digits(s: &[u8]) -> Option<usize> {
+    let n = s.len();
+    let d = s.iter().rev().take_while(|c| c.is_ascii_digit()).count();
+    ((2..=3).contains(&d) && n > d && s[n - d - 1] == b'.').then(|| n - d - 1)
+}
+
 const SPLIT_EXTS: [&[u8]; 14] = [b"7z", b"zip", b"rar", b"tar", b"mkv", b"mp4", b"avi", b"m4v", b"ts", b"m2ts", b"iso", b"img", b"bin", b"vob"];
 const SIDE_EXTS: [&[u8]; 19] = [b"nfo", b"sfv", b"nzb", b"srr", b"srs", b"txt", b"jpg", b"png", b"md5", b"sha1", b"srt", b"sub", b"idx", b"ass", b"ssa", b"m3u", b"m3u8", b"cue", b"log"];
 const PACK_EXTS: [&[u8]; 4] = [b"zst", b"gz", b"xz", b"bz2"];
@@ -164,9 +171,9 @@ fn strip_suffix_rule(s: &[u8], rule: usize) -> Option<usize> {
             }
             ends_ci(s, ext).then(|| n - ext.len())
         }
-        // (?<=\.(7z|…))\.\d{3}$: only the volume number goes.
+        // (?<=\.(7z|…))\.\d{2,3}$: only the volume number goes.
         7 => {
-            let m = strip_three_digits(s)?;
+            let m = strip_volume_digits(s)?;
             strip_ext(&s[..m], &SPLIT_EXTS).map(|_| m)
         }
         8 => strip_ext(s, &SIDE_EXTS),