Fixed typos in Plugin docs:

Many contracts had redundant @scheme[...] around them,
which rendered as (scheme ...) in the final product.

svn: r12546

collects/scribblings/tools/frame.scrbl

@@ -60,7 +60,7 @@ if the
 }
 
 @defmethod[#:mode override 
-           (file-menu:between-open-and-revert [file-menu (is-a?/c @scheme[menu%])])
+           (file-menu:between-open-and-revert [file-menu (is-a?/c menu%)])
            void?]{
 
 Adds an ``Install .plt File...'' menu item, which
@@ -72,7 +72,7 @@ method.
 }
 
 @defmethod[#:mode override 
-           (file-menu:between-print-and-close [file-menu (is-a?/c @scheme[menu%])])
+           (file-menu:between-print-and-close [file-menu (is-a?/c menu%)])
            void?]{
 
 Calls the super method. Then, creates a menu item for
@@ -187,7 +187,7 @@ This interface is the result of the @scheme[drscheme:frame:basics-mixin]
 
 
 
-@defmethod[(add-show-menu-items [show-menu (is-a?/c @scheme[menu%])])
+@defmethod[(add-show-menu-items [show-menu (is-a?/c menu%)])
            void?]{
 @methspec{
 

collects/scribblings/tools/language.scrbl

@@ -415,7 +415,7 @@ for this language.
 }
 
 @defmethod[(get-transformer-module)
-           (or/c quoted-module-path @scheme[#f])]{
+           (or/c quoted-module-path #f)]{
 This method specifies the module that defines the
 transformation language. It is used to initialize
 the transformer portion of the user's namespace.

collects/scribblings/tools/rep.scrbl

@@ -15,7 +15,7 @@ class affect the implementation that uses it.
 
 
 
-@defconstructor/make[([context (implements @scheme[drscheme:rep:context<%>])])]{
+@defconstructor/make[([context (implements drscheme:rep:context<%>)])]{
 }
 
 @defmethod[#:mode override 
@@ -155,7 +155,7 @@ for more information about parameters.
 
 }
 
-@defmethod[(highlight-errors [locs (listof (list (instance (implements @scheme[text:basic<%>])) small-integer small-integer))])
+@defmethod[(highlight-errors [locs (listof (list (instance (implements text:basic<%>)) small-integer small-integer))])
            void?]{
 Call this method to highlight errors associated with this repl.
 See also
@@ -382,7 +382,7 @@ See also
 
 }
 
-@defmethod[(ensure-rep-shown [rep (is-a?/c @scheme[drscheme:rep:text<%>])])
+@defmethod[(ensure-rep-shown [rep (is-a?/c drscheme:rep:text<%>)])
            void?]{
 
 This method is called to force the rep window to be visible when, for

collects/scribblings/tools/unit.scrbl

@@ -43,7 +43,7 @@ Enables the Run button, and the Run menu item and unlocks
            (values (or/c thread? false/c) (or/c custodian? false/c))]{}
 
 @defmethod[(get-defs)
-           (is-a?/c @scheme[drscheme:unit:definitions-text<%>])]{
+           (is-a?/c drscheme:unit:definitions-text<%>)]{
 This text is initially the top half of the drscheme window and
 contains the users program.
 
@@ -73,13 +73,13 @@ is already running (in another thread).
 }
 
 @defmethod[(get-frame)
-           (is-a?/c @scheme[drscheme:unit:frame%])]{
+           (is-a?/c drscheme:unit:frame%)]{
 Returns the frame that this tab is inside.
 
 }
 
 @defmethod[(get-ints)
-           (is-a?/c @scheme[drscheme:rep:text%])]{
+           (is-a?/c drscheme:rep:text%)]{
 This text is initially the bottom half of the drscheme window and
 contains the users interactions with the REPL.
 
@@ -216,7 +216,7 @@ Passes all arguments to @scheme[super-init].
 }
 
 @defmethod[#:mode override 
-           (add-show-menu-items [show-menu (is-a?/c @scheme[menu%])])
+           (add-show-menu-items [show-menu (is-a?/c menu%)])
            void?]{
 
 Adds the ``Show Definitions'', ``Show Interactions'' and
@@ -570,7 +570,7 @@ Shows the interactions window
 }
 
 @defmethod[(get-current-tab)
-           (is-a?/c @scheme[drscheme:unit:tab<%>])]{
+           (is-a?/c drscheme:unit:tab<%>)]{
 Returns the currently active tab.
 
 }
@@ -607,7 +607,7 @@ Returns the Insert menu.
 }}
 
 @defmethod[(get-interactions-canvas)
-           (instanceof (derivedfrom @scheme[drscheme:unit:interactions-canvas%]))]{
+           (instanceof (derivedfrom drscheme:unit:interactions-canvas%))]{
 
 This canvas is the canvas containing the 
 @method[drscheme:unit:frame<%> get-interactions-text]. It is initially the bottom half of the drscheme window.
@@ -621,7 +621,7 @@ it will use the extended class to create the canvas.
 }
 
 @defmethod[(get-interactions-text)
-           (instanceof (derivedfrom @scheme[drscheme:rep:text%]))]{
+           (instanceof (derivedfrom drscheme:rep:text%))]{
 
 Calls result of
 @method[drscheme:unit:frame<%> get-current-tab]'s 
@@ -631,7 +631,7 @@ Calls result of
 }
 
 @defmethod[(get-tabs)
-           (listof @scheme[drscheme:unit:tab<%>])]{
+           (listof drscheme:unit:tab<%>)]{
 Returns the list of tabs in this frame.
 
 }
@@ -656,7 +656,7 @@ The @scheme[from-tab] argument is the previously selected tab, and the
 }}
 
 @defmethod[(register-capability-menu-item [key symbol]
-                                          [menu (is-a? @scheme[menu%])])
+                                          [menu (is-a? menu%)])
            void?]{
 Registers the menu item that was most recently added as
 being controlled by the capability @scheme[key]. This means
@@ -773,7 +773,7 @@ the editor should be used.)
 }
 
 @defmethod[(get-tab)
-           (instanceof @scheme[drscheme:unit:tab%])]{
+           (instanceof drscheme:unit:tab%)]{
 Returns the editor's enclosing tab.
 
 }
@@ -807,7 +807,7 @@ an interaction (unless the Runs first).
 }}
 
 @defmethod[(set-next-settings [language-settings language-settings]
-                              [update-prefs? any/c @scheme[#t]])
+                              [update-prefs? any/c #t])
            void?]{
 
 Changes the language settings for this window. If