dev: fix Makefile spaces to tabs

Author: dshemetov

Makefile

@@ -1,12 +1,15 @@
 install:
-    Rscript -e "install.packages(c('devtools', 'pkgdown', 'webshot', 'textshaping', 'styler', 'lintr'));devtools::install_deps(dependencies = TRUE)"
+	Rscript -e "install.packages(c('devtools', 'pkgdown', 'webshot', 'textshaping', 'styler', 'lintr'));devtools::install_deps(dependencies = TRUE)"
 lint:
-    Rscript -e "devtools::load_all();lintr::lint_package()"
+	Rscript -e "devtools::load_all();lintr::lint_package()"
 format:
-    Rscript -e "styler::style_pkg()"
+	Rscript -e "styler::style_pkg()"
 test:
-    Rscript -e "devtools::test()"
-build:
-    Rscript -e "devtools::document();devtools::build()"
+	Rscript -e "devtools::test()"
+document:
+	Rscript -e "devtools::document()"
+build: document
+	Rscript -e "devtools::build()"
 check:
-    Rscript -e "devtools::check(args = c('--no-manual', '--as-cran'), error_on = 'error')"
+	Rscript -e "devtools::check(args = c('--no-manual', '--as-cran'), error_on = 'warning')"
+chores: format lint check