refactoring by skill

private/cmap-storage.rkt

@@ -830,7 +830,7 @@ SQL
   (and version-number
        (call-with-wiki-database
         config
-        (lambda (db)
+        (λ (db)
           (and
            (query-maybe-value
             db
@@ -962,13 +962,13 @@ SQL
                           'externalUrl)
                 "https://example.com/path")
   (check-exn exn:fail?
-             (lambda ()
+             (λ ()
                (concept-content
                 (hash 'id concept-a
                       'label "Unsafe concept"
                       'externalUrl "javascript:alert(1)"))))
   (check-exn exn:fail?
-             (lambda ()
+             (λ ()
                (concept-map-storage-document
                 (hash 'concepts (list (hash 'id "legacy:map:concept-1"))
                       'items '())))))