elif node.nodeType == node.ELEMENT_NODE:
if node.tagName in ['code', 'em', 'option', 'env']:
s = r'\fB'
for child in node.childNodes:
elif node.nodeType == node.ELEMENT_NODE:
if node.tagName in ['code', 'em', 'option', 'env']:
s = r'\fB'
for child in node.childNodes: