doc/en/Makefile: stabilize output between regendoc versions

doc/en/Makefile

@@ -14,6 +14,8 @@ ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
 
 REGENDOC_ARGS := \
 	--normalize "/[ \t]+\n/\n/" \
+	--normalize "~\$$REGENDOC_TMPDIR~/home/sweet/project~" \
+	--normalize "~/path/to/example~/home/sweet/project~" \
 	--normalize "/in \d+.\d+ seconds/in 0.12 seconds/" \
 	--normalize "@/tmp/pytest-of-.*/pytest-\d+@PYTEST_TMPDIR@" \
 	--normalize "@pytest-(\d+)\\.[^ ,]+@pytest-\1.x.y@" \