Spec.concretize -> spack.concretize.concretize_one(Spec) in Scripting Section (#467)

Author: cmelone

outputs/scripting/spack-python-abstract.out

@@ -1,14 +1,14 @@
   >>> from spack.spec import Spec
-  >>> s = Spec('zlib target=x86_64_v3')
-  >>> s.concrete
+  >>> zlib = Spec('zlib target=x86_64_v3')
+  >>> zlib.concrete
   False
-  >>> s.version
+  >>> zlib.version
   Traceback (most recent call last):
     File "<console>", line 1, in <module>
     File "/home/spack/spack/lib/spack/spack/spec.py", line 3166, in version
       raise SpecError("Spec version is not concrete: " + str(self))
   SpecError: Spec version is not concrete: zlib arch=None-None-x86_64_v3
-  >>> s.versions
+  >>> zlib.versions
   [:]
-  >>> str(s.architecture)
+  >>> str(zlib.architecture)
   None-None-x86_64_v3

outputs/scripting/spack-python-concrete.out

@@ -1,9 +1,9 @@
-  >>> s.concretize()
-  >>> s.concrete
+  >>> zlib_concrete = spack.concretize.concretize_one(zlib)
+  >>> zlib_concrete.concrete
   True
-  >>> s.version
+  >>> zlib_concrete.version
   Version('1.3.1')
-  >>> s.versions
+  >>> zlib_concrete.versions
   [Version('1.3.1')]
-  >>> str(s.architecture)
+  >>> str(zlib_concrete.architecture)
   linux-ubuntu22.04-x86_64_v3