Many terms have underscores in them

[danluu]

For example:

6d6b8015505c7099,1,1,4.61273e-07,2c_thrissur
3e8f9e5769458e9f,1,1,4.61273e-07,government_medical_college

We also have terms with double underscores that appear to be some kind of metadata?

868661c0426526a7,1,1,0.000557102,__noeditsection__
a135c90cbb896da0,1,1,2.97521e-05,__notoc__
14a64ebade034c85,1,1,3.11359e-06,__nogallery__

As well as weird terms that have even more underscores:

b614cd7474e25139,1,1,5.76591e-07,f___
22ed3514efd6df2a,1,1,4.61273e-07,o___y
3ea21b09f892bac0,1,1,4.61273e-07,mother______
c4767d3137687cf6,1,1,9.6262e-07,i_______________________________________