rename holder -> keep

svn: r11932

original commit: 8d06e0c707295a6dee60e722dfafe40c4e2d7992

collects/typed-scheme/private/type-effect-printer.ss

@@ -2,7 +2,7 @@
 
 (require "../utils/utils.ss")
 (require (rep type-rep effect-rep rep-utils)
-	 (utils planet-requires tc-utils)
+	 (utils tc-utils)
 	 scheme/match)
 
 ;; do we attempt to find instantiations of polymorphic types to print? 

collects/typed-scheme/rep/rep-utils.ss

@@ -4,7 +4,6 @@
 (require mzlib/struct 
          mzlib/plt-match
          syntax/boundmap
-         (utils planet-requires)
          "free-variance.ss"
          "interning.ss"
          mzlib/etc

collects/typed-scheme/rep/type-rep.ss

@@ -1,7 +1,7 @@
 #lang scheme/base
 (require "../utils/utils.ss")
 
-(require (utils planet-requires tc-utils) 
+(require (utils tc-utils) 
 	 "rep-utils.ss" "effect-rep.ss" "free-variance.ss"
          mzlib/trace scheme/match
          (for-syntax scheme/base))