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diff --git a/doc/spec/01.01.general_characteristics.tex b/spec/01.01.general_characteristics.tex
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diff --git a/doc/spec/01.02.notation.tex b/spec/01.02.notation.tex
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diff --git a/doc/spec/01.introduction.tex b/spec/01.introduction.tex
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diff --git a/doc/spec/02.abstract_syntax_and_semantics.tex b/spec/02.abstract_syntax_and_semantics.tex
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diff --git a/doc/spec/03.01.lexical_structure.tex b/spec/03.01.lexical_structure.tex
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diff --git a/doc/spec/03.03.scope_expressions.tex b/spec/03.03.scope_expressions.tex
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diff --git a/doc/spec/04.extensions.tex b/spec/04.extensions.tex
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diff --git a/doc/spec/05.driver_options.tex b/spec/05.driver_options.tex
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diff --git a/doc/spec/06.standard_library.tex b/spec/06.standard_library.tex
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diff --git a/doc/spec/Makefile b/spec/Makefile
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index 52d3b6274..d146ad57d 100644
--- a/doc/spec/Makefile
+++ b/spec/Makefile
@@ -7,4 +7,5 @@ metagen:
 	git rev-parse --verify HEAD | LC_TIME=en_US.UTF-8 git show --no-patch --no-notes --pretty='%cd' --date=format:"%B, %e, %Y" > commitdate.tex
 
 clean:
-	rm -Rf *~ *.log *.aux *.toc *.bbl *.blg *.out
+	rm -Rf *~ *.log *.aux *.toc *.bbl *.blg *.out *.bak *.pdf
+
diff --git a/doc/spec/jetbrains.png b/spec/jetbrains.png
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diff --git a/doc/spec/lama-spec.bib b/spec/lama-spec.bib
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