gnu: Fix attributions for Adriano Peluso.

* gnu/packages/emacs.scm, gnu/packages/perl.scm, gnu/packages/python.scm,
gnu/packages/xml.scm: Update copyright attributions for Adriano Peluso.

Signed-off-by: Leo Famulari <leo@famulari.name>

Merge branch 'master' into staging

gnu: perl-sys-cpu: Re-write description.

* gnu/packages/perl.scm (perl-sys-cpu)[description]: Fix some typos by
re-writing most of the description.

Merge branch 'master' into core-updates

ui: Support Texinfo markup in package synopses.

* guix/ui.scm (package-field-string): New procedure.
(package-description-string): Use it.
(package-synopsis-string): New procedure.
(package->recutils): Use it.
* guix/scripts/lint.scm (check-synopsis-style)[check-texinfo-markup]:
New procedure.  Use it in checks.
* tests/lint.scm: Test it.
* gnu/packages/perl.scm (perl-try-tiny)[synopsis]: Adjust for the
Texinfo markup.

gnu: perl-scalar-list-utils: Update to 1.47.

* gnu/packages/perl.scm (perl-scalar-list-utils): Update to 1.47.

gnu: perl-parse-cpan-meta: Update to 2.150010.

* gnu/packages/perl.scm (perl-parse-cpan-meta): Update to 2.150010.

gnu: perl-cpan-meta-yaml: Update to 0.018.

* gnu/packages/perl.scm (perl-cpan-meta-yaml): Update to 0.018.

gnu: perl-cpan-meta-requirements: Update to 2.140.

* gnu/packages/perl.scm (perl-cpan-meta-requirements): Update to 2.140.

gnu: perl-yaml: Update to 1.23.

* gnu/packages/perl.scm (perl-yaml): Update to 1.23.

gnu: perl-variable-magic: Update to 0.61.

* gnu/packages/perl.scm (perl-variable-magic): Update to 0.61.

gnu: perl-time-duration-parse: Update to 0.13.

* gnu/packages/perl.scm (perl-time-duration-parse): Update to 0.13.

gnu: perl-test-warnings: Update to 0.026.

* gnu/packages/perl.scm (perl-test-warnings): Update to 0.026.

gnu: perl-test-simple: Update to 1.302078.

* gnu/packages/perl.scm (perl-test-simple): Update to 1.302078.

gnu: perl-test-exception: Update to 0.43.

* gnu/packages/perl.scm (perl-test-exception): Update to 0.43.

gnu: perl-test-cleannamespaces: Update to 0.22.

* gnu/packages/perl.scm (perl-test-cleannamespaces): Update to 0.22.

gnu: perl-sub-name: Update to 0.21.

* gnu/packages/perl.scm (perl-sub-name): Update to 0.21.

gnu: perl-params-validate: Update to 1.26.

* gnu/packages/perl.scm (perl-params-validate): Update to 1.26.

gnu: perl-package-deprecationmanager: Update to 0.17.

* gnu/packages/perl.scm (perl-package-deprecationmanager): Update to 0.17.

gnu: perl-moose: Update to 2.2004.

* gnu/packages/perl.scm (perl-moose): Update to 2.2004.