message: Add overflow-checks to reference documentation.
  Fixes
diff: @@ -302,6 +302,8 @@ codegen-units = 1 # if > 1 enables parallel code generation which improves
  # Passes `-C codegen-units`. Ignored when `lto = true`.
  panic = 'unwind' # panic strategy (`-C panic=...`), can also be 'abort'
  incremental = true # whether or not incremental compilation is enabled
  +overflow-checks = true # use overflow checks for integer arithmetic.
  + # Passes the `-C overflow-checks=...` flag to the compiler.
  # The release profile, used for `cargo build --release`.
  [profile.release]
  @@ -313,6 +315,7 @@ debug-assertions = false
  codegen-units = 1
  panic = 'unwind'
  incremental = false
  +overflow-checks = false
  # The testing profile, used for `cargo test`.
  [profile.test]
  @@ -324,6 +327,7 @@ debug-assertions = true
  codegen-units = 1
  panic = 'unwind'
  incremental = true
  +overflow-checks = true
  # The benchmarking profile, used for `cargo bench` and `cargo test --release`.
  [profile.bench]
  @@ -335,6 +339,7 @@ debug-assertions = false
  codegen-units = 1
  panic = 'unwind'
  incremental = false
  +overflow-checks = false
  # The documentation profile, used for `cargo doc`.
  [profile.doc]
  @@ -346,6 +351,7 @@ debug-assertions = true
  codegen-units = 1
  panic = 'unwind'
  incremental = true
  +overflow-checks = true
  ```
  ### The `[features]` section
  