maint: update mailmap + fix spacing in docs

Author: mgxd

.mailmap

@@ -14,6 +14,7 @@ Ariel Rokem <arokem@berkeley.edu> arokem <arokem@gmail.com>
 Arman Eshaghi <arman.eshaghi@gmail.com> armaneshaghi <arman.eshaghi@gmail.com>
 Ashely Gillman <gillmanash@gmail.com> Ashley Gillman <ashley.gillman@csiro.au>
 Ashely Gillman <gillmanash@gmail.com> ashgillman <ashley.gillman@csiro.au>
+Andrey Chetverikov <stop.psy@gmail.com> achetverikov <stop.psy@gmail.com>
 Basille Pinsard <basile.pinsard@umontreal.ca> bpinsard <basile.pinsard@umontreal.ca>
 Basille Pinsard <basile.pinsard@umontreal.ca> bpinsard <bpinsard@imed.jussieu.fr>
 Ben Cipollini <bcipollini@classy.org> Ben Cipollini <bcipolli@ucsd.edu>
@@ -79,6 +80,8 @@ Kevin Sitek <ksitek@mit.edu> sitek <ksitek@mit.edu>
 Leonie Lampe <leonie.lampe@gmail.com> Leonie Lmape <leonie.lampe@gmail.com>
 Lukas Snoek <lukassnoek@gmail.com> Lukas Snoek <lukassnoek@gmail.com>
 Mathias Goncalves <goncalves.mathias@gmail.com> mathiasg <mathiasg@mit.edu>
+Matteo Mancini <ingmatteomancini@gmail.com> matteomancini <ingmatteomancini@gmail.com>
+Matteo Visconti dOC <matteo.visconti.gr@dartmouth.edu> mvdoc <matteo.visconti.gr@dartmouth.edu>
 Michael Dayan <mdayan.research@gmail.com> Michael <mdayan.research@gmail.com>
 Michael Dayan <mdayan.research@gmail.com> Michael <mdayan.comp@gmail.com>
 Michael Dayan <mdayan.research@gmail.com> mick-d <mid2021@CHUCK.(none)>

doc/quickstart.rst

@@ -47,6 +47,7 @@ Learning Resources
 ==================
 
 `Porcupine <https://timvanmourik.github.io/Porcupine/getting-started/>`_ : create Nipype pipelines using a graphical interface
+
 View the `examples gallery here <https://timvanmourik.github.io/Porcupine/examples/>`_
 
 Developer guides