(Fforward_word): Stop at a mini-buffer prompt end

in both directions.  Extend documentation.

1 files changed, 10 insertions, 11 deletions

diff --git a/src/syntax.c b/src/syntax.c
index 82fabc254e7..5b5eb341678 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -1227,7 +1227,7 @@ and nil is returned.")
   (count)
      Lisp_Object count;
 {
-  int val;
+  int val, prompt_end;
   CHECK_NUMBER (count, 0);
 
   if (!(val = scan_words (PT, XINT (count))))
@@ -1236,16 +1236,15 @@ and nil is returned.")
       return Qnil;
     }
 
-  /* If in a mini-buffer and moving backwards, stop in front of the
-     prompt if we are currently in front of it.  This prevents
-     accidentially moving into the read-only prompt.  */
-  if (INTEGERP (current_buffer->minibuffer_prompt_length))
-    {
-      int prompt_end = XFASTINT (current_buffer->minibuffer_prompt_length);
-      if (PT > prompt_end && val < prompt_end)
-        val = prompt_end;
-    }
-  
+  /* If in a mini-buffer and moving backwards, stop at the end of the
+     prompt.  This prevents accidentially moving into the read-only
+     prompt.  */
+  if (INTEGERP (current_buffer->minibuffer_prompt_length)
+      && (prompt_end = XINT (current_buffer->minibuffer_prompt_length),
+          ((PT > prompt_end && val < prompt_end)
+           || (PT < prompt_end && val > prompt_end))))
+    val = prompt_end;
+    
   SET_PT (val);
   return Qt;
 }