runtime: Fix more typos (#13354)

* Fix more typos

* Fix typos in ignored runtime/ directory

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/autoload/rustfmt.vim b/runtime/autoload/rustfmt.vim
index 652e6af..8fd3858 100644
--- a/runtime/autoload/rustfmt.vim
+++ b/runtime/autoload/rustfmt.vim
@@ -25,7 +25,7 @@
     silent let s:rustfmt_help = system(g:rustfmt_command . " --help")
     let s:rustfmt_unstable_features = s:rustfmt_help =~# "--unstable-features"
 
-    " Build a comparable rustfmt version varible out of its `--version` output:
+    " Build a comparable rustfmt version variable out of its `--version` output:
     silent let l:rustfmt_version_full = system(g:rustfmt_command . " --version")
     let l:rustfmt_version_list = matchlist(l:rustfmt_version_full,
         \    '\vrustfmt ([0-9]+[.][0-9]+[.][0-9]+)')