change errors to use "object" instead of "obj".

basis/heaps/heaps.factor

@@ -184,7 +184,7 @@ M: heap heap-pop ( heap -- value key )
     [ dup heap-pop swap 2array ]
     produce nip ;
 
-ERROR: not-a-heap obj ;
+ERROR: not-a-heap object ;
 
 : check-heap ( heap -- heap )
     dup heap? [ not-a-heap ] unless ; inline

core/classes/tuple/tuple.factor

@@ -332,7 +332,7 @@ M: error-class reset-class
 : boa-effect ( class -- effect )
     [ all-slots [ name>> ] map ] [ name>> 1array ] bi <effect> ;
 
-ERROR: not-a-tuple-class obj ;
+ERROR: not-a-tuple-class object ;
 
 : check-tuple-class ( class -- class )
     dup tuple-class? [ not-a-tuple-class ] unless ; inline

core/continuations/continuations.factor

@@ -49,7 +49,7 @@ C: <continuation> continuation
 
 <PRIVATE
 
-ERROR: not-a-continuation obj ;
+ERROR: not-a-continuation object ;
 
 : >continuation< ( continuation -- data call retain name catch )
     dup continuation? [ not-a-continuation ] unless

core/lexer/lexer.factor

@@ -15,7 +15,7 @@ TUPLE: lexer
 
 TUPLE: lexer-parsing-word word line line-text column ;
 
-ERROR: not-a-lexer obj ;
+ERROR: not-a-lexer object ;
 
 : check-lexer ( lexer -- lexer )
     dup lexer? [ not-a-lexer ] unless ; inline

extra/gml/core/core.factor

@@ -77,7 +77,7 @@ GML: sort-number-permutation ( array -- permutation )
     zip-index sort-keys reverse values ;
 
 ! Dictionaries
-ERROR: not-a-dict obj ;
+ERROR: not-a-dict object ;
 : check-dict ( obj -- obj' ) dup hashtable? [ not-a-dict ] unless ; inline
 
 GML: begin ( dict -- ) check-dict over dictionary-stack>> push ;
@@ -105,7 +105,7 @@ GML: where ( key -- ? )
 GML: currentdict ( -- dict ) dup current-dict ;
 GML: load ( name -- value ) over lookup-name ;
 
-ERROR: not-a-name obj ;
+ERROR: not-a-name object ;
 
 : check-name ( obj -- obj' ) dup name? [ not-a-name ] unless ; inline