bug#16461: 24.3.50; electric eats too much

[Juri Linkov]

> But I also think that indent-line-to should *not* eat ^L.

This patch fixes the problem and doesn't eat ^L:

=== modified file 'lisp/indent.el'
--- lisp/indent.el      2014-01-15 08:22:41 +0000
+++ lisp/indent.el      2014-01-17 08:05:10 +0000
@@ -265,7 +265,7 @@ (defun indent-line-to (column)
   "Indent current line to COLUMN.
 This function removes or adds spaces and tabs at beginning of line
 only if necessary.  It leaves point at end of indentation."
-  (back-to-indentation)
+  (backward-to-indentation 0)
   (let ((cur-col (current-column)))
     (cond ((< cur-col column)
           (if (>= (- column (* (/ cur-col tab-width) tab-width)) tab-width)
@@ -274,7 +274,7 @@ (defun indent-line-to (column)
           (indent-to column))
          ((> cur-col column) ; too far right (after tab?)
           (delete-region (progn (move-to-column column t) (point))
-                         (progn (back-to-indentation) (point)))))))
+                         (progn (backward-to-indentation 0) (point)))))))
 
 (defun current-left-margin ()
   "Return the left margin to use for this line.