Set integration-test-latest to continue_on_error

Closes informalsystems#304

We want to run the integration test against the latest version, but
don't want it to clutter CI with failures. Tests against the pinned
stable version still fail.

Also fixes some whitespace.

Signed-off-by: Shon Feder <shon@informal.systems>

.github/workflows/rust.yml

@@ -1,11 +1,11 @@
 name: Rust
-on: 
+on:
   pull_request:
     paths-ignore:
-      - 'docs/**'
+      - "docs/**"
   push:
     paths-ignore:
-      - 'docs/**'
+      - "docs/**"
     branches:
       - master
 jobs:
@@ -85,6 +85,9 @@ jobs:
           command: test
           args: -p tendermint --test integration --no-fail-fast -- --ignored
 
+  # NOTE(shonfeder): This job is configured to continue on error, to avoid
+  # failing CI due to integration failures with unstable/unreleased versions
+  # of tendermint-go.
   test-integration-latest:
     runs-on: ubuntu-latest
     services:
@@ -101,6 +104,7 @@ jobs:
           toolchain: stable
           override: true
       - uses: actions-rs/cargo@v1
+        continue_on_error: true
         with:
           command: test
           args: -p tendermint --test integration --no-fail-fast -- --ignored