fix: restore missing imports/comment after .sls→.ss migration

ober

7b41bd77c3e0b357d44535a42227a55955d817eb

diff --git a/lib/std/misc/retry.ss b/lib/std/misc/retry.ss
index bf67dd7..39cf877 100644
--- a/lib/std/misc/retry.ss
+++ b/lib/std/misc/retry.ss
@@ -44,7 +44,8 @@
     circuit-breaker-reset!
     circuit-breaker-stats)
 
-  (import (chezscheme))
+  (import (chezscheme)
+          (only (jerboa core) def defstruct try catch))
 
   ;; ========== Retry Policy ==========
   (defstruct retry-policy-raw (max-attempts base-delay max-delay jitter? on-retry retry-if))
diff --git a/lib/std/os/sysmon.ss b/lib/std/os/sysmon.ss
index 06c5088..32dd310 100644
--- a/lib/std/os/sysmon.ss
+++ b/lib/std/os/sysmon.ss
@@ -163,7 +163,7 @@
   ;; build the symbol is absent from Sforeign_symbol and an unguarded
   ;; foreign-procedure form raises at library visit time. sysctl-read is
   ;; already wrapped in (try ...
-         (catch (e) #f)), so a #f here turns into a
+  ;;        (catch (e) #f)), so a #f here turns into a
   ;; clean fallback.
   (def c-sysctlbyname
     (try (foreign-procedure "sysctlbyname"