Add an equality checking argument to `member`
Update TR base environment
Remove `memq`, `memv`, `member` from #%kernel

These are now implmented purely in Racket on all
platforms.
Fix build. Forgot to add this file in c305dba.

Apologies to any future git bisect-ers
Fix cstartup and the build.

Somehow this got messed up in c305dba though I'm
not sure how.
redex: add `where-make-prefix-pict' and `where-combine' for typesetting
raco setup: fix for bootstrap
New Racket version 5.3.4.12.
add docs for text:column-guide-mixin and text:column-guide<%>
avoid ugly nested conds

Thanks, Laurent!
Protect against invalid package sources
Language-level demodularizer.
Fix typos and shadowed names in class docs
Fix collects for setup with single-collect package

Before this commit, raco would try to setup each
subdirectory inside of a single collection package
as separate collects.
Games:Remove-mzlib-unitsig-and-cleanup
-Remove all instances of mzlib/unitsig in favor of racket/unit
-Prefer /infer forms.
-move to #lang racket from (module ... racket forms
in the modified games and files.
-remove some lingering scheme imports.
-update documentation

-Paint-by-Numbers:
-move to racket/unit
-update solution and problem gen files to generate using racket/unit
-regen the problem and solution sets using racket/unit
avoid printf
fix leading example of 2htdp/planetcute to make it a legal
2htdp/bsl program

closes PR 13844
bring down below 102 columns
Cosmetic restructuring of syntax/modcode.

This work is preparation for exporting more functionality from this module.
Renamed variables for clarity and to eliminate shadowing.
Turned lets into defines.
Split a helper function out from get-module-code in syntax/modcode.

The get-module-path function finds the compiled or source file corresponding
to a module; get-module-code reads and compiles the contents of this file.