patches: fix em-dash and SPECPDL_INDEX ordering

Replace all Unicode em-dashes (---) with ASCII triple-dash (---)
across 0001-0007 (39 occurrences). GNU Emacs source files must be
ASCII; em-dash in comments would cause encoding issues on some systems.

Fix SPECPDL_INDEX() call order in postCompletionAnnouncementForBuffer:
(0003): specpdl_ref must be taken BEFORE block_input() so the snapshot
captures the pre-block_input specpdl depth. This matches the pattern
established in patches 0001 and 0002.

patches/0005-ns-integrate-accessibility-with-EmacsView-and-redisp.patch

@@ -164,7 +164,7 @@ index f5e5cea074..c3cd83b774 100644
  
 -
  /* ===================================================================
-    EmacsAccessibilityBuffer (Notifications) — AX event dispatch
+    EmacsAccessibilityBuffer (Notifications) --- AX event dispatch
  
 @@ -9283,6 +9332,54 @@ - (void)postAccessibilityNotificationsForFrame:(struct frame *)f
  	  granularity = ns_ax_text_selection_granularity_line;
@@ -290,7 +290,7 @@ index f5e5cea074..c3cd83b774 100644
 +
 +  if (WINDOW_LEAF_P (w))
 +    {
-+      /* Buffer element — reuse existing if available.  */
++      /* Buffer element --- reuse existing if available.  */
 +      EmacsAccessibilityBuffer *elem
 +	= [existing objectForKey:[NSValue valueWithPointer:w]];
 +      if (!elem)
@@ -324,7 +324,7 @@ index f5e5cea074..c3cd83b774 100644
 +    }
 +  else
 +    {
-+      /* Internal (combination) window — recurse into children.  */
++      /* Internal (combination) window --- recurse into children.  */
 +      Lisp_Object child = w->contents;
 +      while (!NILP (child))
 +	{
@@ -436,7 +436,7 @@ index f5e5cea074..c3cd83b774 100644
 +  accessibilityUpdating = YES;
 +
 +  /* Detect window tree change (split, delete, new buffer).  Compare
-+     FRAME_ROOT_WINDOW — if it changed, the tree structure changed.  */
++     FRAME_ROOT_WINDOW --- if it changed, the tree structure changed.  */
 +  Lisp_Object curRoot = FRAME_ROOT_WINDOW (emacsframe);
 +  if (!EQ (curRoot, lastRootWindow))
 +    {
@@ -445,12 +445,12 @@ index f5e5cea074..c3cd83b774 100644
 +    }
 +
 +  /* If tree is stale, rebuild FIRST so we don't iterate freed
-+     window pointers.  Skip notifications for this cycle — the
++     window pointers.  Skip notifications for this cycle --- the
 +     freshly-built elements have no previous state to diff against.  */
 +  if (!accessibilityTreeValid)
 +    {
 +      [self rebuildAccessibilityTree];
-+      /* Invalidate span cache — window layout changed.  */
++      /* Invalidate span cache --- window layout changed.  */
 +      for (EmacsAccessibilityElement *elem in accessibilityElements)
 +	if ([elem isKindOfClass: [EmacsAccessibilityBuffer class]])
 +	  [(EmacsAccessibilityBuffer *) elem invalidateInteractiveSpans];