update doc

en/_sources/advanced-use.md.txt

@@ -19,7 +19,7 @@ Advanced Usage
 * [thread](thread.md) - show java thread information
 * [jvm](jvm.md) - show JVM information
 * [sysprop](sysprop.md) - view/modify system properties
-* [sysenv](syspenv.md) — view system environment variables
+* [sysenv](sysenv.md) — view system environment variables
 * **New!** [getstatic](getstatic.md) - examine class's static properties
 * **New!** [ognl](ognl.md) - execute ongl expression
 

en/_sources/redefine.md.txt

@@ -17,7 +17,7 @@ Reference: [Instrumentation#redefineClasses](https://docs.oracle.com/javase/8/do
 
 ### Usage
 
-```
+```bash
 redefine -p /tmp/Test.class
 redefine -c 327a647b -p /tmp/Test.class /tmp/Test$Inner.class
 ```