cargo fmt: three chains rustfmt splits

Formatting only. portable::instant (from F5), and the ffi's link and unlink
(F2/F3), were laid out by hand without a toolchain; rustfmt splits each chain.

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

android/ffi/src/lib.rs

@@ -533,7 +533,9 @@ impl Inkwell {
             Err(CoreError::NotLinked) => None,
             Err(e) => return Err(e),
         };
-        let revoked = link::unlink(&self.db, held).await.map_err(CoreError::store)?;
+        let revoked = link::unlink(&self.db, held)
+            .await
+            .map_err(CoreError::store)?;
         Ok(revoked.into())
     }
 
@@ -739,7 +741,9 @@ impl Inkwell {
         url: &str,
         credential: link::Credential<'_>,
     ) -> Result<Identity, CoreError> {
-        let granted = link::authenticate(url, credential).await.map_err(CoreError::network)?;
+        let granted = link::authenticate(url, credential)
+            .await
+            .map_err(CoreError::network)?;
         self.store_link(&granted.base_url, &granted.token, granted.retention_days)?;
         Ok(granted.identity.into())
     }

core/src/local/portable.rs

@@ -559,7 +559,9 @@ fn strings(v: Option<&Value>) -> Vec<String> {
 /// Any RFC 3339 instant, in the store's own form (UTC, milliseconds, `Z`). Anything
 /// else is treated as absent, as the server's `parse_dt` does.
 fn instant(raw: &str) -> Option<String> {
-    DateTime::parse_from_rfc3339(raw).ok().map(|t| iso(t.with_timezone(&Utc)))
+    DateTime::parse_from_rfc3339(raw)
+        .ok()
+        .map(|t| iso(t.with_timezone(&Utc)))
 }
 
 /// Keep's timestamps: integer microseconds since the epoch.