Fix appending path to inline Blade views

When appending the view path to Blade views with only one line and opening tags we should take into consideration for closing the PHP tag first before appending the path. I've addeded tests which should cover quite a few situations.

Thanks to Sisve for making me aware of this: laravel/framework#28117 (comment)

Compilers/BladeCompiler.php

@@ -123,6 +123,15 @@ public function compile($path = null)
             );
 
             if (! empty($this->getPath())) {
+                $tokens = $this->getOpenAndClosingPHPTokens($contents);
+
+                // If the tokens we retrieved from the compiled contents have at least
+                // one opening tag and if that last token isn't the closing tag, we
+                // need to close the statement before adding the path at the end.
+                if ($tokens->isNotEmpty() && $tokens->last() !== T_CLOSE_TAG) {
+                    $contents .= ' ?>';
+                }
+
                 $contents .= "<?php /**PATH {$this->getPath()} ENDPATH**/ ?>";
             }
 
@@ -132,6 +141,21 @@ public function compile($path = null)
         }
     }
 
+    /**
+     * Returns the open and closing PHP tag tokens which are present in the compiled contents.
+     *
+     * @param  string  $contents
+     * @return \Illuminate\Support\Collection
+     */
+    protected function getOpenAndClosingPHPTokens($contents)
+    {
+        return collect(token_get_all($contents))
+            ->pluck($tokenNumber = 0)
+            ->filter(function ($token) {
+                return in_array($token, [T_OPEN_TAG, T_OPEN_TAG_WITH_ECHO, T_CLOSE_TAG]);
+            });
+    }
+
     /**
      * Get the path currently being compiled.
      *