Apply suggestions from code review

Author: tshepang

src/compiler-debugging.md

@@ -128,11 +128,6 @@ fn main() {
 }
 ```
 
-```bash
-$ rustc +stage1 error.rs
-```
-
-```text
 error[E0277]: cannot add `()` to `{integer}`
  --> error.rs:2:7
   |
@@ -146,11 +141,6 @@ error: aborting due to previous error
 
 Now, where does the error above come from?
 
-```bash
-$ RUST_BACKTRACE=1 rustc +stage1 error.rs -Z treat-err-as-bug
-```
-
-```text
 error[E0277]: the trait bound `{integer}: std::ops::Add<()>` is not satisfied
  --> error.rs:2:7
   |
@@ -196,11 +186,6 @@ Cool, now I have a backtrace for the error!
 `-Z track-diagnostics` can help figure out where errors are emitted. It uses `#[track_caller]`
 for this and prints its location alongside the error:
 
-```bash
-$ RUST_BACKTRACE=1 rustc +stage1 error.rs -Z track-diagnostics
-```
-
-```text
 error[E0277]: cannot add `()` to `{integer}`
  --> src\error.rs:2:7
   |