gs.diff

diff --git a/actions/newnotice.php b/actions/newnotice.php
index 8143850..3dab96d 100644
--- a/actions/newnotice.php
+++ b/actions/newnotice.php
@@ -69,7 +69,7 @@ class NewnoticeAction extends FormAction
     protected function doPreparation()
     {
         foreach(array('inreplyto') as $opt) {
-            if (!empty($this->trimmed($opt))) {
+            if ($this->trimmed($opt)) {
                 $this->formOpts[$opt] = $this->trimmed($opt);
             }
         }
diff --git a/extlib/Mf2/Parser.php b/extlib/Mf2/Parser.php
index 04d44e2..8bf44be 100644
--- a/extlib/Mf2/Parser.php
+++ b/extlib/Mf2/Parser.php
@@ -123,7 +123,7 @@ function unicodeTrim($str) {
  * @return string|array The prefixed name of the first microfomats class found or false
  */
 function mfNamesFromClass($class, $prefix='h-') {
-       $class = str_replace([' ', '    ', "\n"], ' ', $class);
+    $class = str_replace(array(' ', '  ', "\n"), ' ', $class);
        $classes = explode(' ', $class);
        $matches = array();

@@ -149,7 +149,7 @@ function nestedMfPropertyNamesFromClass($class) {
        $prefixes = array('p-', 'u-', 'dt-', 'e-');
        $propertyNames = array();

-       $class = str_replace([' ', '    ', "\n"], ' ', $class);
+    $class = str_replace(array(' ', '  ', "\n"), ' ', $class);
        foreach (explode(' ', $class) as $classname) {
                foreach ($prefixes as $prefix) {
                        if (strpos($classname, $prefix) === 0 and $classname !== $prefix) {