change which to return rather than show
Document thread-safety issues in C callbacks
improve ability to use require from sysimg.jl
Don't assume commutativity for multiplication in QR calculations. Replace ν with v. Fix multiplication with Q' from the right.
Implement UDP
Return vector for vector right hand side in least squares.
Add SharedArray utilities, expand documentation, add a few tests
Concretely specify the type of dims in SubArray

This allows the type of `size(S::SubArray)` to be inferred.
add pointer(s) for strings, change UTF32String.chars to .data for consistency
Merge pull request #5666 from JuliaLang/jn/sysimg_using

improve ability to use require from sysimg.jl
add UndefVarError type for undefined variable errors
use a convention for renamed variables to allow better reporting of the names of undefined variables. fixes #5692
Merge pull request #5646 from WestleyArgentum/which

change which to return rather than show
remove whicht, update doc for methods() and which()
One more relaxation of test bounds in linalg.
Merge pull request #5705 from mschauer/linalg

One more relaxation of test bounds in linalg.
Update base.rst
Merge pull request #5707 from mbauman/patch-1

Doc: repr uses showall, not show
Fix nfilled for AbstractArray, clarify docs, and add test
remove Scheduler