Fix docblocks for File::findPrevious and File::findNext

Author: mmoll

src/Files/File.php

@@ -2095,12 +2095,12 @@ public function getTokensAsString($start, $length, $origContent=false)
      * @param int|string|array $types   The type(s) of tokens to search for.
      * @param int              $start   The position to start searching from in the
      *                                  token stack.
-     * @param int              $end     The end position to fail if no token is found.
+     * @param int|null         $end     The end position to fail if no token is found.
      *                                  if not specified or null, end will default to
      *                                  the start of the token stack.
      * @param bool             $exclude If true, find the previous token that is NOT of
      *                                  the types specified in $types.
-     * @param string           $value   The value that the token(s) must be equal to.
+     * @param string|null      $value   The value that the token(s) must be equal to.
      *                                  If value is omitted, tokens with any value will
      *                                  be returned.
      * @param bool             $local   If true, tokens outside the current statement
@@ -2176,12 +2176,12 @@ public function findPrevious(
      * @param int|string|array $types   The type(s) of tokens to search for.
      * @param int              $start   The position to start searching from in the
      *                                  token stack.
-     * @param int              $end     The end position to fail if no token is found.
+     * @param int|null         $end     The end position to fail if no token is found.
      *                                  if not specified or null, end will default to
      *                                  the end of the token stack.
      * @param bool             $exclude If true, find the next token that is NOT of
      *                                  a type specified in $types.
-     * @param string           $value   The value that the token(s) must be equal to.
+     * @param string|null      $value   The value that the token(s) must be equal to.
      *                                  If value is omitted, tokens with any value will
      *                                  be returned.
      * @param bool             $local   If true, tokens outside the current statement