Add make browser Make target

docs/Makefile

@@ -8,10 +8,15 @@ SPHINXBUILD   ?= sphinx-build
 SOURCEDIR     = .
 BUILDDIR      = _build
 
+docdir := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
+
 # Put it first so that "make" without argument is like "make help".
 help:
 	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
 
+browser: html
+	xdg-open file://$(docdir)/_build/html/index.html
+
 .PHONY: help Makefile
 
 # Catch-all target: route all unknown targets to Sphinx using the new

docs/README.md

@@ -9,4 +9,4 @@ documentation, using Sphinx:
 
 Then point your browser to the newly generated pages:
 
-    xdg-open file://$PWD/_build/html/index.html
+    make browser