message: Minor update to config docs.
diff: @@ -121,6 +121,7 @@ rustdoc = "rustdoc" # the doc generator tool
  target = "triple" # build for the target triple (ignored by `cargo install`)
  target-dir = "target" # path of where to place all generated artifacts
  rustflags = ["..", ".."] # custom flags to pass to all compiler invocations
  +rustdocflags = ["..", ".."] # custom flags to pass to rustdoc
  incremental = true # whether or not to enable incremental compilation
  dep-info-basedir = ".." # full path for the base directory for targets in depfiles
  @@ -133,10 +134,11 @@ color = 'auto' # whether cargo colorizes output
  retry = 2 # number of times a network call will automatically retried
  git-fetch-with-cli = false # if `true` we'll use `git`-the-CLI to fetch git repos
  -# Alias cargo commands. The first 3 aliases are built in. If your
  +# Alias cargo commands. The first 4 aliases are built in. If your
  # command requires grouped whitespace use the list format.
  [alias]
  b = "build"
  +c = "check"
  t = "test"
  r = "run"
  rr = "run --release"
  