Consistently use tabs in Makefile

Author: tilgovi

.editorconfig

@@ -8,3 +8,7 @@ indent_style = space
 insert_final_newline = true
 max_line_length = 80
 trim_trailing_whitespace = true
+
+[Makefile]
+indent_size = 8
+indent_style = tab

Makefile

@@ -14,19 +14,19 @@
 
 # What is the prerelease version?
 vsn_pre = $(shell git describe --tags --always --first-parent \
-        | grep -Eo -- '(-rc\.[0-9]+)?$$' \
-        2>/dev/null)
+	| grep -Eo -- '(-rc\.[0-9]+)?$$' \
+	2>/dev/null)
 
 # What is the release version?
 vsn_rel = $(shell git describe --tags --always --first-parent \
-        | grep -Eo -- '^v[0-9]+\.[0-9]\.[0-9]+' \
-        | tail -c +2 \
-        2>/dev/null)
+	| grep -Eo -- '^v[0-9]+\.[0-9]\.[0-9]+' \
+	| tail -c +2 \
+	2>/dev/null)
 
 # What is the release tag?
 vsn_tag = $(shell git describe --tags --always --first-parent \
-        | grep -Eo -- '^v[0-9]+\.[0-9]\.[0-9]+(-rc.[0-9]+)?$$' \
-        2>/dev/null)
+	| grep -Eo -- '^v[0-9]+\.[0-9]\.[0-9]+(-rc.[0-9]+)?$$' \
+	2>/dev/null)
 
 annotator_vsn = $(vsn_rel)
 
@@ -64,9 +64,9 @@ else
 dist:
 	@rm -rf apache-annotator-$(annotator_vsn)-incubating
 	@git archive \
-        --output apache-annotator-$(annotator_vsn)$(vsn_pre)-incubating.tar.gz \
-        --prefix apache-annotator-$(annotator_vsn)-incubating/ \
-        $(vsn_tag)
+		--output apache-annotator-$(annotator_vsn)$(vsn_pre)-incubating.tar.gz \
+		--prefix apache-annotator-$(annotator_vsn)-incubating/ \
+		$(vsn_tag)
 	@echo "Done: apache-annotator-$(annotator_vsn)$(vsn_pre)-incubating.tar.gz"
 
 endif
@@ -80,6 +80,6 @@ distcheck: dist
 distsign: dist
 	@gpg -ab apache-annotator-$(annotator_vsn)$(vsn_pre)-incubating.tar.gz
 	@sha256sum apache-annotator-$(annotator_vsn)$(vsn_pre)-incubating.tar.gz \
-        > apache-annotator-$(annotator_vsn)$(vsn_pre)-incubating.tar.gz.sha256
+		> apache-annotator-$(annotator_vsn)$(vsn_pre)-incubating.tar.gz.sha256
 	@sha512sum apache-annotator-$(annotator_vsn)$(vsn_pre)-incubating.tar.gz \
-        > apache-annotator-$(annotator_vsn)$(vsn_pre)-incubating.tar.gz.sha512
+		> apache-annotator-$(annotator_vsn)$(vsn_pre)-incubating.tar.gz.sha512