deploy.sh: try to fix shellcheck warnings

scripts/deploy.sh

@@ -28,15 +28,18 @@ docs_readme()
 	yml="scripts/IronOS-mkdocs.yml"
 	md="Documentation/README.md"
 	# ^^^^ hardcoded paths relative to IronOS/ to make this func very trivial
-	echo > "${md}"
-	echo "<!-- THIS FILE IS AUTOGENERATED by \"scripts/deploy.sh docs_readme\" based on nav section in ${yml} config -->" >> "${md}"
-	echo "<!-- THIS FILE IS NOT SUPPOSED TO BE EDITED MANUALLY -->" >> "${md}"
-	echo >> "${md}"
-	echo "#### This is autogenerated README for brief navigation through github over official documentation for IronOS project" >> "${md}"
-	echo "#### This documentation is also available [here online](https://ralim.github.io/IronOS)" >> "${md}"
-	echo >> "${md}"
+# file overwritten section looks out of style but hoping to make shellcheck happy
+cat << EOF > "${md}"
+
+<!-- THIS FILE IS AUTOGENERATED by "scripts/deploy.sh docs_readme" based on nav section in ${yml} config -->
+<!-- THIS FILE IS NOT SUPPOSED TO BE EDITED MANUALLY -->
+
+#### This is autogenerated README for brief navigation through github over official documentation for IronOS project
+#### This documentation is also available [here online](https://ralim.github.io/IronOS)
+
+EOF
 	# it probably will become unexplainable in a few months but so far it works:
-	cat "${yml}" | sed '1,/^nav/d; /^ *$/,$d; s,- ,- [,; s,: ,](../Documentation/,; s,.md,.md),; s,:$,],; s,/Pinecil ,/Pinecil%20,; /^  - \[.*\]$/ s,\[,,; s,]$,,' >> "${md}"
+	sed '1,/^nav/d; /^ *$/,$d; s,- ,- [,; s,: ,](../Documentation/,; s,.md,.md),; s,:$,],; s,/Pinecil ,/Pinecil%20,; /^  - \[.*\]$/ s,\[,,; s,]$,,' "${yml}" >> "${md}"
 	echo ""
 	echo "${yml} is updated. Do not forget to commit & push changes:"
 	echo ""
@@ -76,7 +79,7 @@ cmd="${1}"
 # if only README.md for Documentation update is required then run it & exit
 
 if [ "docs_readme" = "${cmd}" ]; then
-	${cmd}
+	docs_readme
 	exit "${?}"
 fi;