Checkdoc fixes in term/*.el

* lisp/term/android-win.el (android-clear-preedit-text):
* lisp/term/pgtk-win.el (featurep):
* lisp/term/x-win.el (x-clear-preedit-text): Checkdoc fixes.

lisp/term/android-win.el

@@ -223,7 +223,7 @@ VALUE should be something suitable for passing to
 ;; time.  This pre-command-hook clears the overlay before any command
 ;; and should be set whenever a preedit overlay is visible.
 (defun android-clear-preedit-text ()
-  "Clear the pre-edit overlay and remove itself from pre-command-hook.
+  "Clear the pre-edit overlay and remove itself from `pre-command-hook'.
 This function should be installed in `pre-command-hook' whenever
 preedit text is displayed."
   (when android-preedit-overlay
@@ -629,4 +629,4 @@ accessible to other programs."
 
 
 (provide 'android-win)
-;; android-win.el ends here.
+;;; android-win.el ends here

lisp/term/pgtk-win.el

@@ -27,7 +27,7 @@
 
 (eval-when-compile (require 'cl-lib))
 (unless (featurep 'pgtk)
-  (error "%s: Loading pgtk-win.el but not compiled with PGTK."
+  (error "%s: Loading pgtk-win.el but not compiled with PGTK"
          invocation-name))
 
 ;; Documentation-purposes only: actually loaded in loadup.el.

lisp/term/x-win.el

@@ -1523,7 +1523,7 @@ This uses `icon-map-list' to map icon file names to stock icon names."
 ;; time.  This pre-command-hook clears the overlay before any command
 ;; and should be set whenever a preedit overlay is visible.
 (defun x-clear-preedit-text ()
-  "Clear the pre-edit overlay and remove itself from pre-command-hook.
+  "Clear the pre-edit overlay and remove itself from `pre-command-hook'.
 This function should be installed in `pre-command-hook' whenever
 preedit text is displayed."
   (when x-preedit-overlay