refactor: drop lang template mod from Makefile

Key changes:

- Removed all rules that modify the template per language (versions-template-all, add-lang-to-versions-template-%).
- Retained language detection for multi-language builds.
- Assumes language list is passed to the template via Sphinx's conf.py or similar, not injected by Makefile.

Signed-off-by: Josh <josh.t.richards@gmail.com>

Author: joshtrichards

user_manual/Makefile

@@ -1,5 +1,4 @@
 # Makefile for Sphinx documentation
-#
 
 # You can set these variables from the command line.
 SPHINXOPTS    +=
@@ -8,12 +7,14 @@ PAPER         =
 BUILDDIR      = _build
 
 # Internal variables.
-PAPEROPT_a4     = -D latex_paper_size=a4
-PAPEROPT_letter = -D latex_paper_size=letter
-ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+PAPEROPT_a4        = -D latex_paper_size=a4
+PAPEROPT_letter    = -D latex_paper_size=letter
+ALLSPHINXOPTS      = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
 # the i18n builder cannot share the environment and doctrees with the others
-I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
-LANGS = $(shell touch locale/en && ls locale | grep -v source && rm locale/en) # this trick to add en in the list of langs
+I18NSPHINXOPTS     = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+
+# Dynamically build the list of language codes (including 'en')
+LANGS = $(shell touch locale/en && ls locale | grep -v source && rm locale/en)
 
 .PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest gettext
 
@@ -48,12 +49,7 @@ clean:
 
 html:
 	../build/change_file_extension.sh
-	make versions-template-all html-all merge-folders
-
-versions-template-all: $(foreach lang, $(LANGS), add-lang-to-versions-template-$(lang))
-
-add-lang-to-versions-template-%:
-	sed -i '/Here go the languages/i {% set available_languages = available_languages + ["$*"] %}' ./_templates/versions.html
+	make html-all merge-folders
 
 html-all: $(foreach lang, $(LANGS), html-allow-warnings-lang-$(lang))
 
@@ -104,7 +100,7 @@ htmlhelp:
 qthelp:
 	$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
 	@echo
-	@echo "Build finished; now you can run "qcollectiongenerator" with the" \
+	@echo "Build finished; now you can run \"qcollectiongenerator\" with the" \
 	      ".qhcp project file in $(BUILDDIR)/qthelp, like this:"
 	@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/OwncloudDocumentation.qhcp"
 	@echo "To view the help file:"