Fix use of Symbol#| for subscripts in MySQL spec
Fix use of Symbol#| for subscripts in MySQL spec

seeARMS/sequel,freshpay/sequel,dennis-d/custom_sequel,gferguson-gd/sequel,offshore-safety/sequel,yazshel/sequel,dennis-d/custom_sequel,gferguson-gd/sequel,davidbegin/sequel,nicohvi/sequel,offshore-safety/sequel,t-morgan/sequel,Marketcircle/sequel,seeARMS/sequel,knut2/sequel,uhoh-itsmaciek/sequel,beni55/sequel,bigfix/sequel,mpalmer/sequel,uhoh-itsmaciek/sequel,tmm1/sequel,davidbegin/sequel,reubano/sequel,pfarrell/sequel,beni55/sequel,chef/sequel,nju520/sequel,mpalmer/sequel,reubano/sequel,offshore-safety/sequel,t-morgan/sequel,pfarrell/sequel,freshpay/sequel,nju520/sequel,nicohvi/sequel,yazshel/sequel,knut2/sequel