Fix indentation.

Makefile

@@ -10,29 +10,29 @@ all: $(TARGETS)
 
 # Step 0: Create build folder
 $(BUILD_FOLDER):
-        mkdir -p $(BUILD_FOLDER)
+	mkdir -p $(BUILD_FOLDER)
 
 # Step 1: Convert mermaid graphs into pngs and generate README-out.md
 README-out.md: README.md
-        docker run \
-                -u $(shell id -u):$(shell id -g) \
-                -v $(shell pwd):/data \
-                -w /data/ \
-                minlag/mermaid-cli \
-                -i README.md -o README-out.md --outputFormat png \
-                --scale 10
+	docker run \
+		-u $(shell id -u):$(shell id -g) \
+		-v $(shell pwd):/data \
+		-w /data/ \
+		minlag/mermaid-cli \
+		-i README.md -o README-out.md --outputFormat png \
+		--scale 10
 
 # Step 2: Generate PDFs from README-out.md using pandoc
 $(BUILD_FOLDER)/%.pdf: $(BUILD_FOLDER) README-out.md
-        docker run \
-                -u $(shell id -u):$(shell id -g) \
-                -w /data/ \
-                -v $(shell pwd):/data \
-                ghcr.io/ethan42/pandoctex \
-                pandoc README-out.md -f gfm -s \
-                --pdf-engine=xelatex \
-                -o "$(BUILD_FOLDER)/$*.pdf" \
-                -V mainfont="Linux Libertine O" \
-                -V monofont="Noto Mono" \
-                -V fontsize=12pt \
-                -V colorlinks=true -V linkcolor=darkgray -V urlcolor=blue -V toccolor=gray
+	docker run \
+		-u $(shell id -u):$(shell id -g) \
+		-w /data/ \
+		-v $(shell pwd):/data \
+		ghcr.io/ethan42/pandoctex \
+		pandoc README-out.md -f gfm -s \
+		--pdf-engine=xelatex \
+		-o "$(BUILD_FOLDER)/$*.pdf" \
+		-V mainfont="Linux Libertine O" \
+		-V monofont="Noto Mono" \
+		-V fontsize=12pt \
+		-V colorlinks=true -V linkcolor=darkgray -V urlcolor=blue -V toccolor=gray