patch 8.2.2343: Vim9: return type of readfile() is any
Problem: Vim9: return type of readfile() is any.
Solution: Add readblob() so that readfile() can be expected to always
return a list of strings. (closes #7671)
diff --git a/runtime/doc/usr_41.txt b/runtime/doc/usr_41.txt
index 5f9c8e1..bac064c 100644
--- a/runtime/doc/usr_41.txt
+++ b/runtime/doc/usr_41.txt
@@ -820,6 +820,7 @@
setenv() set an environment variable
hostname() name of the system
readfile() read a file into a List of lines
+ readblob() read a file into a Blob
readdir() get a List of file names in a directory
readdirex() get a List of file information in a directory
writefile() write a List of lines or Blob into a file