patch 9.1.0747: various typos in repo found

Problem:  various typos in repo found
Solution: Fix typos (zeertzjq)

closes: #15749

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/quickfix.txt b/runtime/doc/quickfix.txt
index ea5f01d..dc05166 100644
--- a/runtime/doc/quickfix.txt
+++ b/runtime/doc/quickfix.txt
@@ -1349,7 +1349,7 @@
 Additional arguments can be passed to groff by setting them in
 `b:groff_compiler_args` or `g:groff_compiler_args`. The `language` argument
 passed to groff is set using 'spelllang'; it can be overridden by setting
-`b:groff_compiler_lang`. The default enconding is `UTF-8` and can be changed
+`b:groff_compiler_lang`. The default encoding is `UTF-8` and can be changed
 by setting `b:groff_compiler_encoding` or `g:groff_compiler_encoding`.
 
 PANDOC					*quickfix-pandoc* *compiler-pandoc*