Include intersphinx extension to generate objects inventory (#850)

* Use intersphinx to generate objects inventory

* Fixed warnings from example section in docstring of dpctl.lsplatform

Author: Diptorup Deb

docs/conf.in

@@ -55,6 +55,7 @@ extensions = [
     "sphinx.ext.autosummary",
     "sphinx.ext.coverage",
     "sphinx.ext.extlinks",
+    "sphinx.ext.intersphinx",
     "sphinx.ext.githubpages",
     "sphinx.ext.napoleon",
     "sphinx.ext.todo",

dpctl/_sycl_platform.pyx

@@ -298,7 +298,7 @@ def lsplatform(verbosity=0):
         On a system with an OpenCL CPU driver, OpenCL GPU driver,
         Level Zero GPU driver, running the command. ::
 
-        $python -c "import dpctl; dpctl.lsplatform()"
+            $ python -c "import dpctl; dpctl.lsplatform()"
 
         returns ::