move comments out-of-line to please the extremely picky macOS shell

Makefile.coq.local

@@ -17,6 +17,13 @@ tests/.coqdeps.d: $(TESTFILES)
 	$(HIDE)$(COQDEP) -dyndep var $(COQMF_COQLIBS_NOML) $^ $(redir_if_ok)
 -include tests/.coqdeps.d
 
+# Main test script (comments out-of-line because macOS otherwise barfs?!?)
+# - Determine reference file (`REF`).
+# - Print user-visible status line.
+# - Dump Coq output into a temporary file.
+# - Run `sed -i` on that file in a way that works on macOS.
+# - Either compare the result with the reference file, or move it over the reference file.
+# - Cleanup, and mark as done for make.
 $(TESTFILES:.v=.vo): %.vo: %.v $(if $(MAKE_REF),,%.ref) $(NORMALIZER)
 	$(HIDE)TEST="$$(basename -s .v $<)" && \
 	  if test -f "tests/$$TEST.$(COQ_MINOR_VERSION).ref"; then \
@@ -25,16 +32,12 @@ $(TESTFILES:.v=.vo): %.vo: %.v $(if $(MAKE_REF),,%.ref) $(NORMALIZER)
 	    REF="tests/$$TEST.ref"; \
 	  fi && \
 	  echo "COQTEST$(if $(COQ_OLD), [no ref],$(if $(MAKE_REF), [make ref],)) $<$(if $(COQ_OLD),, (ref: $$REF))" && \
-	  # Dump Coq output into temporary file. \
 	  TMPFILE="$$(mktemp)" && \
 	  $(TIMER) $(COQ_TEST) $(COQFLAGS) $(COQLIBS) -load-vernac-source $< > "$$TMPFILE" && \
-	  # `sed -i` in a way that also works on macOS. \
 	  sed -f $(NORMALIZER) "$$TMPFILE" > "$$TMPFILE".new && \
 	  mv "$$TMPFILE".new "$$TMPFILE" && \
-	  # Either compare temporary file with reffile or move it there. \
 	  $(if $(COQ_OLD),true, \
 	    $(if $(MAKE_REF),mv "$$TMPFILE" "$$REF",diff -u "$$REF" "$$TMPFILE") \
 	  ) && \
-	  # Cleanup, and mark as done for make. \
 	  rm -f "$$TMPFILE" && \
 	  touch $@