cmake-mode.el: Replace 'setq' with 'let' or inlining

Auxiliary/cmake-mode.el

@@ -276,25 +276,27 @@ optional argument topic will be appended to the argument list."
     (if buffer
         (display-buffer buffer 'not-this-window)
       ;; Buffer doesn't exist.  Create it and fill it
-      (setq buffer (generate-new-buffer bufname))
-      (setq command (concat cmake-mode-cmake-executable " " type " " topic))
-      (message "Running %s" command)
-      ;; We don't want the contents of the shell-command running to the
-      ;; minibuffer, so turn it off.  A value of nil means don't automatically
-      ;; resize mini-windows.
-      (setq resize-mini-windows-save resize-mini-windows)
-      (setq resize-mini-windows nil)
-      (shell-command command buffer)
-      ;; Save the original window, so that we can come back to it later.
-      ;; save-excursion doesn't seem to work for this.
-      (setq window (selected-window))
-      ;; We need to select it so that we can apply special modes to it
-      (select-window (display-buffer buffer 'not-this-window))
-      (cmake-mode)
-      (toggle-read-only t)
-      ;; Restore the original window
-      (select-window window)
-      (setq resize-mini-windows resize-mini-windows-save)
+      (let ((buffer (generate-new-buffer bufname))
+            (command (concat cmake-mode-cmake-executable " " type " " topic))
+            )
+        (message "Running %s" command)
+        ;; We don't want the contents of the shell-command running to the
+        ;; minibuffer, so turn it off.  A value of nil means don't automatically
+        ;; resize mini-windows.
+        (setq resize-mini-windows-save resize-mini-windows)
+        (setq resize-mini-windows nil)
+        (shell-command command buffer)
+        ;; Save the original window, so that we can come back to it later.
+        ;; save-excursion doesn't seem to work for this.
+        (setq window (selected-window))
+        ;; We need to select it so that we can apply special modes to it
+        (select-window (display-buffer buffer 'not-this-window))
+        (cmake-mode)
+        (toggle-read-only t)
+        ;; Restore the original window
+        (select-window window)
+        (setq resize-mini-windows resize-mini-windows-save)
+        )
       )
     )
   )
@@ -330,9 +332,8 @@ optional argument topic will be appended to the argument list."
 (defun cmake-help-command ()
   "Prints out the help message corresponding to the command the cursor is on."
   (interactive)
-  (setq command (cmake-get-topic "command"))
-  (cmake-command-run "--help-command" (downcase command))
-  )
+  (cmake-command-run "--help-command" (downcase (cmake-get-topic "command"))))
+
 
 ;;;###autoload
 (progn