fix library-reference import syntax (#723)

LOG

@@ -2429,3 +2429,7 @@
     csug/csug.stex bintar/Makefile rpm/Makefile pkg/Makefile
     wininstall/Makefile wininstall/a6nt.wxs wininstall/i3nt.wxs
     wininstall/ta6nt.wxs wininstall/ti3nt.wxs
+
+9.6.3 changes:
+- fix (library <library reference>) import syntax
+    mats/8.ms release_notes/release_notes.stex s/syntax.ss

mats/8.ms

@@ -3417,6 +3417,30 @@
         (import-only A B)
         x))
     'b)
+  (begin
+    (library (for mat) (export x) (import (scheme)) (define x 123))
+    (library (a b c) (export d) (import (scheme)) (define d 27))
+    (library (xd)
+      (export ls)
+      (import (scheme) (library (for mat)) (library (a b c)))
+      (define ls (list x d)))
+    #t)
+  (equal? 123
+    (let ([x 'port])
+      (import (library (for mat)))
+      x))
+  (equal? 27
+    (let ([d 'nile])
+      (import (library (a b c)))
+      d))
+  (equal? 27
+    (let ([d 'nile])
+      (import (a b c))
+      d))
+  (equal? '(123 27)
+    (let ([x 'treme] [d 'nile])
+      (import (xd))
+      ls))
 )
 
 (mat export ; test stand-alone export form

release_notes/release_notes.stex

@@ -1966,6 +1966,11 @@ in fasl files does not generally make sense.
 %-----------------------------------------------------------------------------
 \section{Bug Fixes}\label{section:bugfixes}
 
+\subsection{Library-reference import syntax}
+
+A bug where \scheme{import} did not recognize a \var{library-spec}
+of the form \scheme{(library \var{library-reference})} has been fixed.
+
 \subsection{Garbage collector incorrectly handles emphemerons (9.6.0)}
 
 A bug where the garbage collector sometimes incorrectly handles epehemeron pairs has

s/syntax.ss

@@ -4250,7 +4250,7 @@
            (and (not std?) (id? #'mid))
            (determine-module-imports "module" #'mid #'mid #'mid)]
           [(?library-reference lr)
-           (sym-kwd? ?library-reference library-reference)
+           (sym-kwd? ?library-reference library)
            (let-values ([(mid tid) (lookup-library #'lr)])
              (determine-module-imports "library" #'lr mid tid))]
           [lr (let-values ([(mid tid) (lookup-library #'lr)])