Make updating text for conceal mode simpler. A few compiler warning fixes.
diff --git a/runtime/doc/index.txt b/runtime/doc/index.txt
index da56816..743c712 100644
--- a/runtime/doc/index.txt
+++ b/runtime/doc/index.txt
@@ -1352,6 +1352,7 @@
|:options| :opt[ions] open the options-window
|:ounmap| :ou[nmap] like ":unmap" but for Operator-pending mode
|:ounmenu| :ounme[nu] remove menu for Operator-pending mode
+|:ownsyntax| :ow[nsyntax] set new local syntax highlight for this window
|:pclose| :pc[lose] close preview window
|:pedit| :ped[it] edit file in the preview window
|:perl| :pe[rl] execute Perl command