[web2py] Error using A() tag

[pbreit]

I'm getting an error on:
{{=A('move out', _href=URL('#myModal'), _data-toggle='modal')}}

Traceback (most recent call last):
  File "/Users/pbreit/web2py/gluon/restricted.py", line 204, in restricted
    ccode = compile2(code,layer)
  File "/Users/pbreit/web2py/gluon/restricted.py", line 189, in compile2
    return compile(code.rstrip().replace('\r\n','\n')+'\n', layer, 'exec')
  File 
"/Users/pbreit/web2py/applications/rentmatic/views/default/property.html", line 
115
    
SyntaxError: keyword can't be an expression

The problem is with the dash in the '_data-toggle' attribute.

This works OK but of course I need it to be '_data-toggle'.
{{=A('move out', _href=URL('#myModal'), _data='modal')}}

The error is different when there is just a dash at the end:
{{=A('move out', _href=URL('#myModal'), _data-='modal')}}

Traceback (most recent call last):
  File "/Users/pbreit/web2py/gluon/restricted.py", line 204, in restricted
    ccode = compile2(code,layer)
  File "/Users/pbreit/web2py/gluon/restricted.py", line 189, in compile2
    return compile(code.rstrip().replace('\r\n','\n')+'\n', layer, 'exec')
  File 
"/Users/pbreit/web2py/applications/rentmatic/views/default/property.html", line 
115
    response.write(A('move out', _href=URL('#myModal'), _data-='modal'))
                                                              ^
SyntaxError: invalid syntax


I'm pretty sure this used to work.

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