misc/emacs: clear previous overlays before adding new ones

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/12578044

diff --git a/misc/emacs/go-mode.el b/misc/emacs/go-mode.el
index 8e613d6d2608fd85793e80b16bf06edbc4d4e905..a72fd911cbaa3acee9567c57a08b53152e8fe836 100644 (file)
--- a/misc/emacs/go-mode.el
+++ b/misc/emacs/go-mode.el
@@ -998,6 +998,7 @@ coverage information gathered via go test -coverprofile=INPUT."
                           (get-buffer gocov-buffer-name)
                           (clone-indirect-buffer gocov-buffer-name nil))
       (save-excursion
+        (remove-overlays)
         (overlay-put
          (make-overlay
           (point-min)