cmake-mode.el: Rename function to be consistent

unscreamify-cmake-buffer => cmake-unscreamify-buffer

While at it, wrap the operation in (save-excursion).

Auxiliary/cmake-mode.el

@@ -172,17 +172,19 @@ the indentation.  Otherwise it retains the same position on the line"
 ;;
 ;; Helper functions for buffer
 ;;
-(defun unscreamify-cmake-buffer ()
+(defun cmake-unscreamify-buffer ()
   "Convert all CMake commands to lowercase in buffer."
   (interactive)
-  (goto-char (point-min))
-  (while (re-search-forward "^\\([ \t]*\\)\\(\\w+\\)\\([ \t]*(\\)" nil t)
-    (replace-match
-     (concat
-      (match-string 1)
-      (downcase (match-string 2))
-      (match-string 3))
-     t))
+  (save-excursion
+    (goto-char (point-min))
+    (while (re-search-forward "^\\([ \t]*\\)\\(\\w+\\)\\([ \t]*(\\)" nil t)
+      (replace-match
+       (concat
+        (match-string 1)
+        (downcase (match-string 2))
+        (match-string 3))
+       t))
+    )
   )
 
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