diff --git a/src/editfns.c b/src/editfns.c
index a3f220671a8..ea71c3cda37 100644
--- a/src/editfns.c
+++ b/src/editfns.c
@@ -1693,7 +1693,7 @@ If narrowing is in effect, this function returns only the visible part
 of the buffer.
 
 This function copies the text properties of that part of the buffer
-into the result string; if you don’t want the text properties,
+into the result string; if you don't want the text properties,
 use `buffer-substring-no-properties' instead.  */)
   (void)
 {
@@ -2082,7 +2082,7 @@ nil.  */)
   ptrdiff_t j = size_b;
   /* Walk backwards through the lists of changes.  This was also
      cargo-culted from src/analyze.c in GNU Diffutils.  Because we
-     walk backwards, we don’t have to keep the positions in sync.  */
+     walk backwards, we don't have to keep the positions in sync.  */
   while (i >= 0 || j >= 0)
     {
       rarely_quit (++ctx.quitcounter);
@@ -3395,7 +3395,7 @@ usage: (format-message STRING &rest OBJECTS)  */)
   return styled_format (nargs, args, true);
 }
 
-/* Implement ‘format-message’ if MESSAGE is true, ‘format’ otherwise.  */
+/* Implement `format-message' if MESSAGE is true, `format' otherwise.  */
 
 static Lisp_Object
 styled_format (ptrdiff_t nargs, Lisp_Object *args, bool message)