refactoring

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			#
			# @file Makefile
			#
			# @brief
			#
			# @copyright
			# Copyright (©) 2021 EPFL (Ecole Polytechnique Fédérale de Lausanne)
			# SPC (Swiss Plasma Center)
			#
			# spclibs is free software: you can redistribute it and/or modify it under
			# the terms of the GNU Lesser General Public License as published by the Free
			# Software Foundation, either version 3 of the License, or (at your option)
			# any later version.
			#
			# spclibs is distributed in the hope that it will be useful, but WITHOUT ANY
			# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
			# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
			#
			# You should have received a copy of the GNU Lesser General Public License
			# along with this program. If not, see <https://www.gnu.org/licenses/>.
			#
			# @authors
			# (in alphabetical order)
			# @author Trach-Minh Tran <trach-minh.tran@epfl.ch>
			#
			all: multigrid.pdf multigrid_2d.pdf mg_gbs.pdf

			grid.eps: grid.tex
			tex grid.tex
			dvips -o grid.eps grid.dvi

			mg_gbs.dvi: grid.eps

			clean:
			rm -f grid.eps .dvi .log .aux ~ .toc .flc .bbl .blg .out ~

			distclean: clean

			.SUFFIXES:
			.SUFFIXES: .tex .dvi .pdf

			%.dvi: %.tex
			latex $<
			@while ( grep "Rerun to get cross-references" \
			${<:tex=log} > /dev/null ); do \
			latex $<; \
			done
			latex $<

			%.pdf: %.dvi
			dvipdf $<