[Docs] Tweak some wording

Author: bbatsov

doc/modules/ROOT/pages/repl/configuration.adoc

@@ -139,10 +139,10 @@ By default, REPL results have no prefix.
 == Set ns in REPL
 
 By default `cider-repl-set-ns` won't require the target ns, just set
-it. That's done with the assumption that you've probably evaluated the
-ns in question already before switching to it (e.g. by doing `C-c C-k`
-in its source file). If you want to change this behaviour (to avoid
-calling `cider-repl-set-ns` and then `(require 'my-ns)` manually), you
+it. That's done with the assumption that you've probably evaluated the ns in
+question already before switching to it (e.g. by doing kbd:[C-c C-k]
+(`cider-load-buffer`) in its source buffer). If you want to change this behaviour
+(to avoid calling `cider-repl-set-ns` and then `(require 'my-ns)` manually), you
 can set:
 
 [source,lisp]