Function: _<<=_
Section: symbolic_operators
C-Name: gshiftle
Prototype: &L
Help: x<<=y: shortcut for x=x<<y.
Description:
(*small, small):small:parens $1 <<= $(2)
(*int, small):int:parens $1 = shifti($1, $2)
(*mp, small):mp:parens $1 = mpshift($1, $2)
(*gen, small):mp:parens $1 = gshift($1, $2)