make simplify-callable prettyprinting an optional load in extra

basis/prettyprint/backend/backend.factor

@@ -3,9 +3,8 @@
 USING: accessors arrays byte-arrays byte-vectors generic hashtables
 assocs kernel math namespaces make sequences strings sbufs vectors
 words prettyprint.config prettyprint.custom prettyprint.sections
-prettyprint.backend.callables quotations io io.pathnames io.styles
-math.parser effects classes.tuple math.order classes.tuple.private
-classes combinators colors ;
+quotations io io.pathnames io.styles math.parser effects classes.tuple
+math.order classes.tuple.private classes combinators colors ;
 IN: prettyprint.backend
 
 M: effect pprint* effect>string "(" ")" surround text ;
@@ -178,7 +177,7 @@ M: callstack pprint-delims drop \ CS{ \ } ;
 M: object >pprint-sequence ;
 M: vector >pprint-sequence ;
 M: byte-vector >pprint-sequence ;
-M: callable >pprint-sequence simplify-callable ;
+M: callable >pprint-sequence ;
 M: hashtable >pprint-sequence >alist ;
 M: wrapper >pprint-sequence wrapped>> 1array ;
 M: callstack >pprint-sequence callstack>array ;

extra/prettyprint/callables/callables-docs.factor

@@ -1,5 +1,5 @@
-USING: help help.markup help.syntax ;
-IN: prettyprint.backend.callables
+USING: help help.markup help.syntax kernel quotations ;
+IN: prettyprint.callables
 
 HELP: simplify-callable
 { $values { "quot" callable } { "quot'" callable } }

extra/prettyprint/callables/callables-tests.factor

@@ -1,7 +1,7 @@
 ! (c) 2009 Joe Groff bsd license
-USING: kernel math prettyprint prettyprint.backend.callables
+USING: kernel math prettyprint prettyprint.callables
 tools.test ;
-IN: prettyprint.backend.callables
+IN: prettyprint.callables.tests
 
 [ [ dip ] ] [ [ dip ] simplify-callable ] unit-test
 [ [ [ + ] dip ] ] [ [ [ + ] dip ] simplify-callable ] unit-test

extra/prettyprint/callables/callables.factor

@@ -1,7 +1,8 @@
 ! (c) 2009 Joe Groff bsd license
 USING: combinators combinators.short-circuit generalizations
-kernel macros math math.ranges quotations sequences words ;
-IN: prettyprint.backend.callables
+kernel macros math math.ranges prettyprint.custom quotations
+sequences words ;
+IN: prettyprint.callables
 
 <PRIVATE
 
@@ -70,3 +71,5 @@ PRIVATE>
 
 : simplify-callable ( quot -- quot' )
     [ (simplify-callable) ] to-fixed-point ;
+
+M: callable >pprint-sequence simplify-callable ;