scaled-openline.patch

diff --git a/api/src/scala/scaled/major/EditingMode.scala b/api/src/scala/scaled/major/EditingMode.scala
index 96171fb..c22afe7 100644
--- a/api/src/scala/scaled/major/EditingMode.scala
+++ b/api/src/scala/scaled/major/EditingMode.scala
@@ -40,7 +40,8 @@ abstract class EditingMode (env :Env) extends ReadingMode(env) {
 
     bind("newline",                "ENTER", "S-ENTER").
     bind("indent-for-tab-command", "TAB").
-    // TODO: open-line, split-line, ...
+    bind("open-line", "C-o").
+    // TODO: split-line, ...
 
     bind("indent-rigidly",   "M-RIGHT").
     bind("unindent-rigidly", "M-LEFT").
@@ -260,6 +261,13 @@ abstract class EditingMode (env :Env) extends ReadingMode(env) {
     buffer.split(view.point())
   }
 
+  @Fn("""Opens a line above the current line.""")
+  def openLine() {
+    val was = view.point()
+    newline()
+    view.point() = was
+  }
+
   @Fn("Indents the current line or region, or inserts a tab, as appropriate.")
   def indentForTabCommand () {
     // TODO: I suppose we'll eventually have to support real tabs... sigh