fix some whitespace issues (#483)

Also, those are not sh scripts

src/compiler-documenting.md

@@ -9,13 +9,13 @@ available like the standard library. There’s two ways to go about this.
 
 ## Document everything
 
-   ```bash
+```ignore
 ./x.py doc
 ```
 
 ## If you want to avoid the whole Stage 2 build
 
-```bash
+```ignore
 ./x.py doc --stage 1
 ```
 
@@ -24,7 +24,7 @@ and then it documents the files.
 
 ## Document specific components
 
-```bash
+```ignore
 ./x.py doc src/doc/book
 ./x.py doc src/doc/nomicon
 ./x.py doc src/doc/book src/libstd
@@ -41,14 +41,14 @@ But, when enabled, compiler documentation does include internal items.
 
 Next open up config.toml and make sure these two lines are set to true:
 
-```bash
+```toml
 docs = true
 compiler-docs = true
 ```
 
 When you want to build the compiler docs as well run this command:
 
-```bash
+```ignore
 ./x.py doc
 ```