human
Solve the following python programming problem given the following code:
def _format_strings(self) : 
    if (self.float_format is None) : 
        float_format = get_option ('display.float_format') 
        if (float_format is None) : 
            fmt_str = ('%% .%dg' % get_option ('display.precision')) 
            float_format = (lambda x : (fmt_str % x)) 
else : 
        float_format = self.float_format 
formatter = (self.formatter if (self.formatter is not None) else (lambda x : pprint_thing (x, escape_chars = ('\t', '\r', '
')))) 
    def _format(x) : 
        if ((self.na_rep is not None) and lib.checknull (x)) : 
            if (x is None) : 
                return 'None' 
else : 
                if (x is pd.NaT) : 
                    return 'NaT' 
return self.na_rep 
else : 
            if isinstance (x, PandasObject) : 
                return ('%s' % x) 
else : 
                return ('%s' % formatter (x)) 
vals = self.values 
    if isinstance (vals, Index) : 
        vals = vals._values 
is_float = (lib.map_infer (vals, com.is_float) & notnull (vals)) 
    leading_space = is_float.any () 
    fmt_values = [] 
    for (i, v) in enumerate (vals) : 
        if ((not is_float [i]) and fmt_values) : 
            fmt_values.append ((' %s' % _format (v))) 
else : 
            if is_float [i] : 
                fmt_values.append (float_format (v)) 
else : 
                fmt_values.append ((' %s' % _format (v))) 
return fmt_values 

    
    

    Fix the buggy line: if ((not is_float [i]) and fmt_values) :
assistant
#Here is Python program to fix the buggy line: if ((not is_float [i]) and fmt_values) :
.

if ((not is_float [i]) and leading_space) :