Updated print-options.

NEWS

@@ -335,6 +335,25 @@ Now:
     guile> #: foo
     #:foo
 
+** The printing of symbols that might look like keywords can be
+   controlled.
+
+The new printer option 'quote-keywordish-symbols' controls how symbols
+are printed that have a colon as their first or last character.  The
+default now is to only quote a symbol with #{...}# when the read
+option 'keywords' is not '#f'.  Thus:
+
+    guile> (define foo (string->symbol ":foo"))
+    guile> (read-set! keywords #f)
+    guile> foo
+    :foo
+    guile> (read-set! keywords 'prefix)
+    guile> foo
+    #{:foo}#
+    guile> (print-set! quote-keywordish-symbols #f)
+    guile> foo
+    :foo
+
 ** 'while' now provides 'break' and 'continue'
 
 break and continue were previously bound in a while loop, but not

doc/ref/api-options.texi

@@ -513,8 +513,18 @@ Here is the list of print options generated by typing
 values.
 
 @smallexample
-source          no      Print closures with source.
+quote-keywordish-symbols reader How to print symbols that have a colon
-closure-hook    #f      Hook for printing closures.
+                                as their first or last character. The
+                                value '#f' does not quote the colons;
+                                '#t' quotes them; 'reader' quotes
+                                them when the reader option
+                                'keywords' is not '#f'.
+
+highlight-prefix         @{      The string to print before highlighted values.
+highlight-suffix         @}      The string to print after highlighted values.
+
+source                   no     Print closures with source.
+closure-hook             #f     Hook for printing closures.
 @end smallexample