feat: in show {package} output, clarify meaning of 'required by' entries (#9750)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: elliot-100

docs/cli.md

@@ -509,7 +509,7 @@ dependencies
  - pytzdata >=2017.2.2
 
 required by
- - calendar >=1.4.0
+ - calendar requires >=1.4.0
 ```
 
 ### Options

src/poetry/console/commands/show.py

@@ -195,7 +195,7 @@ def _display_single_package_information(
             self.line("")
             self.line("<info>required by</info>")
             for parent, requires_version in required_by.items():
-                self.line(f" - <c1>{parent}</c1> <b>{requires_version}</b>")
+                self.line(f" - <c1>{parent}</c1> requires <b>{requires_version}</b>")
 
         return 0
 

tests/console/commands/test_show.py

@@ -1975,7 +1975,7 @@ def test_show_required_by_deps(
  - msgpack-python >=0.5 <0.6
 
 required by
- - pendulum >=0.2.0 <0.3.0
+ - pendulum requires >=0.2.0 <0.3.0
 """.splitlines()
     actual = [line.rstrip() for line in tester.io.fetch_output().splitlines()]
     assert actual == expected