correction

Makefile

@@ -37,7 +37,7 @@ DVIPS	= dvips
 PDFPS	= pdftops
 PDF	= max_print_line=1000 pdflatex -shell-escape -src -halt-on-error -synctex=1 -interaction nonstopmode -file-line-error-style
 OPEN    = xdg-open
-MD5SUM  = md5sum --quiet
+MD5SUM  = md5sum
 
 # Mac-specific definitions
 ifeq ($(shell uname), Darwin)
@@ -97,7 +97,7 @@ edit: $(SRCNAMES)
 	$(LATEX) $(@:.dvi=.tex) || (touch --date="`date -R -r $(@:.dvi=.tex)`" $@ & false)
 
 	@echo If the citations were updated recompile the .bbl file
-	grep -o -G "Citation \`[^']*" $(@:.dvi=.log) | $(MD5SUM) -c $(@:.dvi=.cit) || $(BIBTEX) $(@:.dvi=.aux)
+	grep -o -G "Citation \`[^']*" $(@:.dvi=.log) | $(MD5SUM) -c --quiet $(@:.dvi=.cit) || $(BIBTEX) $(@:.dvi=.aux)
 
 	while grep -q "Rerun to get cross-references right." $(@:.dvi=.log); \
 	do $(LATEX) $(@:.dvi=.tex); done
@@ -122,7 +122,7 @@ edit: $(SRCNAMES)
 	test -s $(@:.pdf=.cit) || echo '' | $(MD5SUM) > $(@:.pdf=.cit)
 
 	@echo If the citations were updated recompile the .bbl file
-	grep -o -G "Citation \`[^']*" $(@:.pdf=.log) | $(MD5SUM) -c $(@:.pdf=.cit) || ($(BIBTEX) $(@:.pdf=.aux); $(PDF) $(@:.pdf=.tex) >/dev/null)
+	grep -o -G "Citation \`[^']*" $(@:.pdf=.log) | $(MD5SUM) -c --quiet $(@:.pdf=.cit) || ($(BIBTEX) $(@:.pdf=.aux); $(PDF) $(@:.pdf=.tex) >/dev/null)
 
 	@echo -n "Search for dangling references.. "
 	@if grep -q "Rerun to get cross-references right." $(@:.pdf=.log); \