strange how instable the results of asciiart are

Chapters/BasicsOnExecution/figures/Makefile

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+# https://www.gnu.org/software/make/manual/html_node/
+# https://crates.io/crates/svgbob_cli
+# https://github.com/ivanceras/svgbob?tab=readme-ov-file	
+
+# Find all the -ascii.txt files we want to compile
+# Note the single quotes around the * expressions. The shell will incorrectly expand these otherwise, but we want to send the * directly to the find command.
+SRC_DIRS := .
+BUILD_DIR := .
+SRCS := $(shell find $(SRC_DIRS) -name '*-ascii.txt')
+PDFs := $(SRCS:-ascii.txt=.pdf)
+
+.PHONY: default
+default: all
+
+all: $(PDFs)
+
+%.svg : %-ascii.txt
+	svgbob_cli $< -o $@
+
+%.pdf : %.svg
+	rsvg-convert -f pdf -o $@ $<
+
+.PHONY: clean
+clean:
+	rm -rf *.svg $(PDFs)

Chapters/BasicsOnExecution/figures/README.md

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+# About the figures
+
+## Old figures: omnigraffle
+
+Old figures are made with omnigraffle and exported to pdf and png.
+Latex output uses pdf.
+
+The problem with these is that keeping the same look and feel over all of these is very complicated.
+
+## New figures: asciiart -> svg -> pdf
+
+Using asciiart allows me (Guille) to keep the same look and feel in the figures.
+Converting ascii art to pdf requires two command line tools: `aasvg` and `rsvg-convert` which I installed as follows in Mac:
+
+```bash
+npm install -g aasvg
+sudo apt-get install librsvg2-bin
+
+```
+If the previous apt-get does not work
+
+Notice that you should also install svgbob 
+```
+brew install librsvg
+brew install svgbob
+```
+
+Figure source code is asciiart and named `*-ascii.txt`.
+We then convert them to svg using the following commands.
+
+**TIP: Use the makefile ;)**
+
+```
+aasvg < x.txt > x.svg
+rsvg-convert -f pdf -o x.pdf x.svg
+```

Chapters/BasicsOnExecution/figures/width_0-ascii.txt

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+Rectangle / #width
+<01> pushRcvr: 1 --- push the value of the receiver's second instance variable (corner )  onto the stack
+<7E> send: x --- send the unary message x
+<00> pushRcvr: 0 --- push the value of the receiver's first instance variable (origin ) onto the stack
+<7E> send:   x --- send the unary message x
+<61> send:   - --- send the binary message -
+<5C> returnTop - return the object on top of the stack as the value of the message (width ) 
+
+
+