t / t4034 / cpp / poston commit completion: use __gitcomp_builtin in _git_tag (80eb519)
   1Foo() : x(0&42) { bar(x); }
   2cout<<"Hello World?\n"<<endl;
   3(1) (-1e10) (0xabcdef) 'y'
   4[x] x->y x.y
   5!x ~x x++ x-- x*y x&y
   6x*y x/y x%y
   7x+y x-y
   8x<<y x>>y
   9x<y x<=y x>y x>=y
  10x==y x!=y
  11x&y
  12x^y
  13x|y
  14x&&y
  15x||y
  16x?y:z
  17x=y x+=y x-=y x*=y x/=y x%=y x<<=y x>>=y x&=y x^=y x|=y
  18x,y
  19x::y