Update runtime files.
diff --git a/runtime/doc/autocmd.txt b/runtime/doc/autocmd.txt
index ebb6197..2a5f5fd 100644
--- a/runtime/doc/autocmd.txt
+++ b/runtime/doc/autocmd.txt
@@ -1639,7 +1639,7 @@
   :  autocmd BufReadPre,FileReadPre	*.gz set bin
   :  autocmd BufReadPost,FileReadPost	*.gz '[,']!gunzip
   :  autocmd BufReadPost,FileReadPost	*.gz set nobin
-  :  autocmd BufReadPost,FileReadPost	*.gz execute ":doautocmd BufReadPost " . expand("%:r")
+  :  autocmd BufReadPost,FileReadPost	*.gz execute ":doautocmd BufReadPost " .. expand("%:r")
   :  autocmd BufWritePost,FileWritePost	*.gz !mv <afile> <afile>:r
   :  autocmd BufWritePost,FileWritePost	*.gz !gzip <afile>:r
 
@@ -1738,7 +1738,7 @@
   :  else
   :    let l = line("$")
   :  endif
-  :  exe "1," . l . "g/Last modified: /s/Last modified: .*/Last modified: " .
+  :  exe "1," .. l .. "g/Last modified: /s/Last modified: .*/Last modified: " ..
   :  \ strftime("%Y %b %d")
   :endfun