Move the srfi references to the section ends.

collects/scribblings/reference/pairs.scrbl

@@ -696,7 +696,6 @@ Like @racket[assoc], but finds an element using the predicate
 @; ----------------------------------------
 @section{Additional List Functions and Synonyms}
 
-@margin-note{More list functions are defined in @racketmodname[srfi/1].}
 @note-lib[racket/list]
 @(define list-eval (make-base-eval))
 @(interaction-eval #:eval list-eval
@@ -1029,6 +1028,8 @@ the result of @racket[proc]. Signals an error on an empty list.
 (range 10 15 1.5)
 ]}
 
+You can find additional list functions in @racketmodname[srfi/1].
+
 
 @close-eval[list-eval]
 

collects/scribblings/reference/strings.scrbl

@@ -369,7 +369,6 @@ allocated string).}
 @; ----------------------------------------
 @section{Additional String Functions}
 
-@margin-note{More string functions are defined in @racketmodname[srfi/13].}
 @note-lib[racket/string]
 @(define string-eval (make-base-eval))
 @(interaction-eval #:eval string-eval (require racket/string racket/list))
@@ -433,4 +432,6 @@ true, otherwise they get normalized too.
  (string-normalize-spaces "  foo bar  baz \r\n\t")
 ]}
 
+You can find additional string functions in @racketmodname[srfi/13].
+
 @close-eval[string-eval]

collects/scribblings/reference/time.scrbl

@@ -159,7 +159,6 @@ result is the result of @racket[expr].}
 
 @section[#:tag "date-string"]{Date Utilities}
 
-@margin-note{More date and time functions are defined in @racketmodname[srfi/19].}
 @note-lib-only[racket/date]
 
 @defproc[(current-date) date*?]{
@@ -221,3 +220,6 @@ calculations.}
 
 Converts a Julian number (Scalinger's off-by-one version) into a
 string.}
+
+You can find additional date and time functions in
+@racketmodname[srfi/19].