(nesting typo)

IPython/core/page.py

@@ -310,10 +310,10 b' def get_pager_cmd(pager_cmd=None):'
             pager_cmd = default_pager_cmd
     
     if pager_cmd == 'less':
-    try:
-        os.getenv('LESS').index('-r')
-    except (ValueError, AttributeError):
-        pager_cmd += ' -r'
+        try:
+            os.getenv('LESS').index('-r')
+        except (ValueError, AttributeError):
+            pager_cmd += ' -r'
     
     return pager_cmd