"Message emitted" improvements caused issues

Wrapping "Message emitted" in monospaced formatting,
causes `W1507` (`pylint/checkers/stdlib.py`) to fail on a stray space.

Fix that - as it seems to be the only outlier.
(Might've been nice for a more formal check in the first place 🙏).

Signed-off-by: Stavros Ntentos <133706+stdedos@users.noreply.github.com>

pylint/checkers/stdlib.py

@@ -386,7 +386,7 @@ class StdlibChecker(DeprecatedMixin, BaseChecker):
             "By default, the first parameter is the group param, not the target param.",
         ),
         "W1507": (
-            "Using copy.copy(os.environ). Use os.environ.copy() instead. ",
+            "Using copy.copy(os.environ). Use os.environ.copy() instead.",
             "shallow-copy-environ",
             "os.environ is not a dict object but proxy object, so "
             "shallow copy has still effects on original object. "

tests/functional/s/shallow_copy_environ.txt

@@ -1,2 +1,2 @@
-shallow-copy-environ:7:0:7:21::Using copy.copy(os.environ). Use os.environ.copy() instead. :UNDEFINED
-shallow-copy-environ:17:0:17:18::Using copy.copy(os.environ). Use os.environ.copy() instead. :UNDEFINED
+shallow-copy-environ:7:0:7:21::Using copy.copy(os.environ). Use os.environ.copy() instead.:UNDEFINED
+shallow-copy-environ:17:0:17:18::Using copy.copy(os.environ). Use os.environ.copy() instead.:UNDEFINED