* doc/build.scm (guile-lib/htmlprag-fixed): New variable.
(syntax-highlighted-html): Use it instead of GUILE-LIB.

* gnu/packages/lxqt.scm (qtermwidget)[inputs]: Add utf8proc.

* gnu/packages/vpn.scm (wireguard): Update to 0.0.20190905.

* gnu/packages/linux.scm (linux-libre-5.2-version): Update to 5.2.13.
(linux-libre-5.2-pristine-source): Update hash.

* gnu/packages/linux.scm (linux-libre-4.19-version): Update to 4.19.71.
(linux-libre-4.19-pristine-source): Update hash.

* gnu/packages/linux.scm (linux-libre-4.14-version): Update to 4.14.142.
(linux-libre-4.14-pristine-source): Update hash.

* gnu/packages/linux.scm (linux-libre-4.9-version): Update to 4.9.191.
(linux-libre-4.9-pristine-source): Update hash.

* gnu/packages/linux.scm (linux-libre-4.4-version): Update to 4.4.191.
(linux-libre-4.4-pristine-source): Update hash.

This reverts commit 3b38bf14.

The Guix project discussed this years ago and decided against including
/usr/bin/env.  That decision should not be reversed without a wider
discussion.

* gnu/packages/python-xyz.scm (python-scipy): Update to 1.3.1.
(python2-scipy): Keep at version 1.2.2.

* gnu/packages/xfce.scm (xfce4-panel)[inputs]: Add tzdata.
[arguments] Add Fix-tzdata-path phase.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/xfce.scm (libxfce4ui)[arguments]: Add #:configure-flags.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/xfce.scm (libxfce4ui): Add gobject-introspection to native-inputs.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/xfce.scm (xfconf)[arguments]: Rename check phase to
  custom-check.
  [native-inputs]: Add dbus.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/xfce.scm (xfconf): Add vala to native-inputs.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/xfce.scm (xfconf): Add gobject-introspection to native-inputs.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* doc/build.scm (syntax-highlighted-html): New procedure.
(html-manual): Use it.

* gnu/packages/qt.scm (qtwebkit)[supported-systems]: New field.

Fixes a typo in 0403d01f.

* gnu/packages/lisp.scm (ecl-net.didierverna.asdf-flv): New name of the
second occurrence of 'ecl-alexandria'.

* gnu/packages/emacs-xyz.scm (emacs-poet-theme): New variable.

* gnu/packages/mail.scm (exim): Update to 4.92.2.

* gnu/packages/crates-io.scm (rust-constant-time-eq, rust-fixedbitset,
rust-futures, rust-pico-sys, rust-pkg-config, rust-quick-error,
rust-remove-dir-all, rust-spin, rust-tempdir, rust-traitobject,
rust-void)[home-page]: Update to correct home-page.

* gnu/packages/bioinformatics.scm (samblaster): New variable.

* gnu/packages/bioconductor.scm (r-txdb-celegans-ucsc-ce6-ensgene): New
variable.

* gnu/packages/crates-io.scm (rust-parity-wasm): New variable.

* gnu/packages/crates-io.scm (rust-time): New variable.

* gnu/packages/crates-io.scm (rust-semver-parser-0.7): New variable.

* gnu/packages/crates-io.scm (rust-getopts): New variable.

* gnu/packages/crates-io.scm (rust-clang-sys): New variable.

* gnu/packages/crates-io.scm (rust-glob-0.2): New variable.

* gnu/packages/crates-io.scm (rust-glob): New variable.

* gnu/packages/crates-io.scm (rust-sourcefile): New variable.

* gnu/packages/crates-io.scm (rust-miow-0.2): New variable.

* gnu/packages/crates-io.scm (rust-miow): New variable.

* gnu/packages/crates-io.scm (rust-ansi-term): New variable.

* gnu/packages/crates-io.scm (rust-socket2): New variable.

* gnu/packages/crates-io.scm (rust-tar): New variable.

* gnu/packages/crates-io.scm (rust-filetime): New variable.

* gnu/packages/crates-io.scm (rust-xattr): New variable.

* gnu/packages/crates-io.scm (rust-tempfile): New variable.