runtime(doc): fix typos.

* Fix typo in document (Related: #12516)
* Fix E1363 duplication
* Fix one more typo.

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 4f9a3c9..41b7d56 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -2424,7 +2424,7 @@
 		".exe" is not added to v:progpath.
 		Read-only.
 
-				    *v:python3_version* *python3-version-variable*
+				*v:python3_version* *python3-version-variable*
 v:python3_version
 		Version of Python 3 that Vim was built against.  When
 		Python is loaded dynamically (|python-dynamic|), this version