more edits in the package pages.

v2/en/linux-packages.md

@@ -2,7 +2,7 @@
     @title         Linux Packages
 --->
 
-OpenResty provides official pre-built packages for the following Linux distributions and versions:
+OpenResty provides official pre-built packages for the following Linux distributions and versions.
 
 * RHEL/CentOS
 
@@ -25,7 +25,7 @@ OpenResty provides official pre-built packages for the following Linux distribut
 # RHEL/CentOS
 
 You can add the `openresty` repository to your RHEL or CentOS system so as to easily install
-our packages and receive updates automatically in the future. To add the repository, just
+our packages and receive updates in the future (via the `yum update` command). To add the repository, just
 create the file named `/etc/yum.repos.d/OpenResty.repo` with the following content:
 
 ```ini
@@ -63,7 +63,7 @@ sudo dnf copr enable openresty/openresty
 ```
 
 Then you can easily install packages from the `openresty-openresty` repository and receive updates
-automatically in the future. For example, to install the `openresty` package, we can just run the
+in the future (through the `dnf update` command). For example, to install the `openresty` package, we can just run the
 following command:
 
 ```bash

v2/en/rpm-packages.md

@@ -2,7 +2,7 @@
     @title         RPM Packages
 --->
 
-The OpenResty official Yum repositories provide the following RPM packages:
+The OpenResty official Yum repositories provide the following RPM packages.
 
 # openresty
 
@@ -69,8 +69,6 @@ restydoc ngx_lua
 
 restydoc -s content_by_lua
 
-restydoc -s table.concat
-
 restydoc -s proxy_pass
 ```
 
@@ -89,6 +87,10 @@ differences:
 2. It enables the NGINX debugging log capability.
 3. It uses the `openresty-openssl-debug` package instead of `openresty-openssl` for the OpenSSL library.
 4. It enables API checks and assertions in the LuaJIT build.
+5. It enables the assertions in the `ngx_http_lua` module.
+6. It makes the `ngx_http_lua` module abort the current nginx worker process immediately upon LuaJIT allocation
+failures in its GC-managed memory (the default behavior is logging an error message and gracefully quit
+the current worker process).
 
 You should never use this package in production. This package is for development only.
 
@@ -103,6 +105,10 @@ done in the `openresty-debug` package:
 2. It enforces LuaJIT to use the system allocator instead of its own.
 3. It enables the internal Valgrind co-operations in the LuaJIT build.
 
+See the following tutorials on more details on Valgrind-based testing in the context of OpenResty:
+
+https://openresty.gitbooks.io/programming-openresty/content/testing/test-modes.html#_valgrind_mode
+
 # openresty-openssl
 
 This is our own build of the OpenSSL library. In particular, we have disabled the threads support in the build