A lot of "MzScheme" -> "Racket"s.

original commit: 2d9601089d1d127374238fdbe41a344ca88ca52f

collects/scribblings/gui/editor-funcs.scrbl

@@ -361,7 +361,7 @@ The handler recognizes editor files by the first twelve characters of
  insert-file], and then converting the editor content into a port with
  @scheme[open-input-text-editor]. After obtaining a port in this way,
  the content is read in essentially the same way as by the default
- MzScheme load handler. The difference is that the editor may contain
+ Racket load handler. The difference is that the editor may contain
  instances of @scheme[readable-snip<%>], which are ``read'' though the
  snips' @method[readable-snip<%> read-special] method; see
  @scheme[open-input-text-editor] for details.

collects/scribblings/gui/event-class.scrbl

@@ -22,7 +22,7 @@ See @method[event% get-time-stamp] for information about
            exact-integer?]{
 
 Returns the time, in milliseconds, when the event occurred. This time
- is compatible with times reported by MzScheme's
+ is compatible with times reported by Racket's
  @scheme[current-milliseconds] procedure.
 
 }
@@ -31,7 +31,7 @@ Returns the time, in milliseconds, when the event occurred. This time
            void?]{
 
 Set the time, in milliseconds, when the event occurred. See also
- MzScheme's @scheme[current-milliseconds].
+ Racket's @scheme[current-milliseconds].
 
 If the supplied value is outside the platform-specific range of time
  values, @|MismatchExn|.

collects/scribblings/gui/eventspace-funcs.scrbl

@@ -180,14 +180,14 @@ Evaluating @scheme[(yield 'wait)] is thus similar to
  sensitive to whether the current thread is a handler thread, instead
  of the value of the @scheme[current-eventspace] parameter.
 
-If @scheme[v] is an event in MzScheme's sense (not to be confused with
+If @scheme[v] is an event in Racket's sense (not to be confused with
  a GUI event), @scheme[yield] blocks on @scheme[v] in the same way as
  @scheme[sync], except that it may start a @scheme[sync] on @scheme[v]
  multiple times (but it will complete a @scheme[sync] on @scheme[v] at
  most one time). If the current thread is the current eventspace's
  handler thread, events are dispatched until a @scheme[v] sync
  succeeds on an event boundary. For other threads, calling
- @scheme[yield] with a MzScheme event is equivalent to calling
+ @scheme[yield] with a Racket event is equivalent to calling
  @scheme[sync]. In either case, the result is the same that of
  @scheme[sync]; however, if a wrapper procedure is associated with
  @scheme[v] via @scheme[handle-evt], it is not called in tail position

collects/scribblings/gui/miscwin-funcs.scrbl

@@ -86,7 +86,7 @@ The result depends on @scheme[what], and a @scheme[#f] result is only
  @item{@scheme['init-file] returns the path to the user-specific
  initialization file (containing Scheme code). The directory part of
  the path is the same path as returned for @scheme['init-dir] by
- MzScheme's @scheme[find-system-path].  The file name is
+ Racket's @scheme[find-system-path].  The file name is
  platform-specific:
   @itemize[
 
@@ -367,7 +367,7 @@ containing a typestring and value; each typestring is used ad the
 keyword name of an AppleEvent argument for the associated converted
 value. 
 
-The following types of MzScheme values can be converted to AppleEvent
+The following types of Racket values can be converted to AppleEvent
 values passed to the receiver:
 
 @atable[
@@ -390,7 +390,7 @@ if there is an error. If there is no error or return value,
 @scheme[send-event] returns @|void-const|.
 
 The following types of AppleEvent values can be reverse-converted into
-a MzScheme value returned by @scheme[send-event]:
+a Racket value returned by @scheme[send-event]:
 
 @atable[
 (tline @elem{Boolean}  @elem{@scheme[#t] or @scheme[#f]})
@@ -477,4 +477,4 @@ See also @scheme[get-resource].}
 @defproc[(key-code-symbol? [v any/c]) boolean?]{
   Returns @scheme[#t] if the argument is a symbol that can be returned by
   @scheme[key-event%]'s method @method[key-event% get-key-code].
-}
+}