tests: make coverage run in parallel mode, clean up coverage code

revlog: fix undefined variable introduced in 5726bb290bfe

parentrevspec: remove a trailing colon

purge: fix spelling error

zsh-comp: explain how to use for non-global install

use ui instead of repo.ui when the former is in scope

cmdutils: Take over glob expansion duties from util

match: fix _patsplit breakage with drive letters

statichttprepo: handle remote not supporting Range headers - If remote does not support Range header, 200 is answered instead of 206. The HTTPRangeHandler left these responses unchanged, so the data has to be sliced by the receiver. - httprangereader file pointer was not updated.

convert: better feedback when filtering out empty revisions Original patch by Herbert Griebel <herbertg@gmx.at>