restore cursor pos when formating

Author: pfitzseb

lib/runtime/formatter.js

@@ -49,7 +49,10 @@ function formatEditorTextInRange (editor, range, text) {
       })
     } else {
       if (marker.isValid()) {
+        const pos = editor.getCursorBufferPosition()
         editor.setTextInBufferRange(marker.getBufferRange(), formattedtext)
+        editor.scrollToBufferPosition(pos)
+        editor.setCursorBufferPosition(pos)
       } else {
         atom.notifications.addError('Julia-Client: Format-Code', {
           description: 'Cancelled the formatting task because the selected code has been manually modified.',