CHANGE: simplified output by `poetry version` (#1591)

* CHANGE: output by `poetry version` simplified to `<project_name> <version>`

* FIX: adopt `test_version_show` to recognize new output format

poetry/console/commands/version.py

@@ -59,7 +59,7 @@ patch, minor, major, prepatch, preminor, premajor, prerelease.
             self.poetry.file.write(content)
         else:
             self.line(
-                "Project (<comment>{}</>) version is <info>{}</>".format(
+                "<comment>{}</> <info>{}</>".format(
                     self.poetry.package.name, self.poetry.package.pretty_version
                 )
             )

tests/console/commands/test_version.py

@@ -44,4 +44,4 @@ def test_version_show(app):
     command = app.find("version")
     tester = CommandTester(command)
     tester.execute()
-    assert "Project (simple-project) version is 1.2.3\n" == tester.io.fetch_output()
+    assert "simple-project 1.2.3\n" == tester.io.fetch_output()