doc: minor fixes.

Author: agentzh

README.markdown

@@ -1335,7 +1335,7 @@ Runs the Lua code specified by the argument `<lua-script-str>` on the global Lua
 
 When Nginx receives the `HUP` signal and starts reloading the config file, the Lua VM will also be re-created and `init_by_lua` will run again on the new Lua VM. In case that the [lua_code_cache](#lua_code_cache) directive is turned off (default on), the `init_by_lua` handler will run upon every request because in this special mode a standalone Lua VM is always created for each request.
 
-Usually you can pre-load Lua modules at server start-up by means of this hook and take advantage of modern operating system's copy-on-write (COW) optimization. Here is an example for pre-loading Lua modules:
+Usually you can pre-load Lua modules at server start-up by means of this hook and take advantage of modern operating systems' copy-on-write (COW) optimization. Here is an example for pre-loading Lua modules:
 
 ```nginx
 

doc/HttpLuaModule.wiki

@@ -1057,7 +1057,7 @@ Runs the Lua code specified by the argument <code><lua-script-str></code> on the
 
 When Nginx receives the <code>HUP</code> signal and starts reloading the config file, the Lua VM will also be re-created and <code>init_by_lua</code> will run again on the new Lua VM. In case that the [[#lua_code_cache|lua_code_cache]] directive is turned off (default on), the <code>init_by_lua</code> handler will run upon every request because in this special mode a standalone Lua VM is always created for each request.
 
-Usually you can pre-load Lua modules at server start-up by means of this hook and take advantage of modern operating system's copy-on-write (COW) optimization. Here is an example for pre-loading Lua modules:
+Usually you can pre-load Lua modules at server start-up by means of this hook and take advantage of modern operating systems' copy-on-write (COW) optimization. Here is an example for pre-loading Lua modules:
 
 <geshi lang="nginx">
     # this runs before forking out nginx worker processes: