 fixed typo in tsqr documentation and improved clarity (#3698)
 fixed typo in tsqr documentation and improved clarity (#3698)


dask/dask,jakirkham/dask,blaze/dask,jcrist/dask,mrocklin/dask,dask/dask,jcrist/dask,ContinuumIO/dask,mrocklin/dask,blaze/dask,ContinuumIO/dask,jakirkham/dask