Simplify the range scan code generate while also avoiding an unnecessary
OP_Affinity opcode.
Add the --query option to the wordcount test program.
Improvements to the Expr comparison routine to make it more general.
Improvements to unary-minus code generation so that it can make use of
a global constant register with a zero value.
Add test cases for INSERT INTO ... DEFAULT VALUES on tables with numeric
constants in CHECK constraints.
Changes to make the new constant expression factoring logic more general
and more testable.
Fix comments on the OP_Divide and OP_Remainder operators, especially the
"Synopsis:" comment, so that they agree with the actual implementation.
Merge the operator comment fixes from trunk.
Add ALWAYS and NEVER macros to currently unreachable but important branches in
sqlite3ExprCompare().