runtime(doc): remove unnecessary "an"

"umask" is pronounce like "youmask", so having an "an" before it is a
bit strange.  In other places in the help, "umask" is not preceded by
either "a" or "an", and sometimes preceded by "the".

Also, "Note" is usually followed either by ":" or "that" in builtin.txt,
so add a ":" after "Note".

closes: 16860

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index ec1088933e922ee26f02c19787c5c3c90addf7f3..b7df7c561ca4b69aaf8300d7d05bf8e1cf6d6619 100644 (file)
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -7588,7 +7588,7 @@ mkdir({name} [, {flags} [, {prot}]])                      *mkdir()* *E739*
                the new directory.  The default is 0o755 (rwxr-xr-x: r/w for
                the user, readable for others).  Use 0o700 to make it
                unreadable for others.  This is used for the newly created
-               directories.  Note an umask is applied to {prot} (on Unix).
+               directories.  Note: umask is applied to {prot} (on Unix).
                Example: >
                        :call mkdir($HOME .. "/tmp/foo/bar", "p", 0o700)