From 540b67046c2e94e8198b2ade7b3d9fcae315c36b Mon Sep 17 00:00:00 2001
From: John Denker <jsd@av8n.com>
Date: Thu, 11 Nov 2021 14:17:28 -0700
Subject: fix it so that -(123) shows correctly, i.e. not dropping the - sign

---
 parser.php | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/parser.php b/parser.php
index 0efc21b..4423c38 100644
--- a/parser.php
+++ b/parser.php
@@ -1378,15 +1378,24 @@ class qtype_algebra_parser_bracket extends qtype_algebra_parser_term {
     // Static class properties.
     const NARGS = 1;
     private static $formats = array(
-        '(' => array('str' => '(%s)',
-                      'tex' => '\\left( %s \\right)'),
-        '[' => array('str' => '[%s]',
-                      'tex' => '\\left[ %s \\right]'),
-        '{' => array('str' => '{%s}',
-                      'tex' => '\\left\\lbrace %s \\right\\rbrace'),
-        '<' => array('str' => '(%s)',
-                      'tex' => '{%s}')
+        '(' => array('str' => '%s(%s)',
+                      'tex' => '%s\\left( %s \\right)'),
+        '[' => array('str' => '%s[%s]',
+                      'tex' => '%s\\left[ %s \\right]'),
+        '{' => array('str' => '%s{%s}',
+                      'tex' => '%s\\left\\lbrace %s \\right\\rbrace'),
+        '<' => array('str' => '%s(%s)',
+                      'tex' => '%s{%s}')
     );
+
+    public function print_args($method) {
+        $args = array($this->_sign);
+        foreach ($this->_arguments as $arg) {
+            $args[] = $arg->$method();
+        }
+        // Return the array of arguments.
+        return $args;
+    }
 }
 
 
-- 
cgit v1.2.3