Revert "try named builds for coverage & fmt"

This reverts commit 0fed8d8fa364c81f5728cac4c47a94a9547ea434.

.travis.yml

@@ -1,6 +1,6 @@
 sudo: required
 language: rust
-
+dist: trusty
 addons:
   apt:
     packages:
@@ -9,38 +9,36 @@ cache:
   directories:
   - $HOME/.cargo
 env:
-  matrix:
   - ELEFREN_FEATURES="--features toml"
   - ELEFREN_FEATURES="--features json"
   - ELEFREN_FEATURES="--features all"
   - ELEFREN_FEATURES=""
-
+os:
+  - linux
+  - osx
+rust:
+  - stable
+  - beta
+  - nightly
+before_script:
+  - |
+    if [[ "$TRAVIS_RUST_VERSION" == "nightly"* ]]; then rustup component add rustfmt-preview; fi
+before_cache:
+  - |
+    if [[ "$TRAVIS_RUST_VERSION" == "nightly"* ]] 2> /dev/null && [ -z "$ELEFREN_FEATURES" ] 2>/dev/null && [[ "$TRAVIS_OS_NAME" == "linux" ]] 2>/dev/null; then
+      RUSTFLAGS="--cfg procmacro2_semver_exempt" cargo install -f cargo-tarpaulin
+    fi
 script:
+  - |
+    if [[ "$TRAVIS_RUST_VERSION" == "nightly"* ]]; then cargo fmt --all -- --check; fi
   - cargo test $ELEFREN_FEATURES
-
+after_success: |
+  if [[ "$TRAVIS_RUST_VERSION" == "nightly"* ]] 2> /dev/null && [ -z "$ELEFREN_FEATURES" ] 2>/dev/null && [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
+    cargo tarpaulin --ciserver travis-ci --coveralls $TRAVIS_JOB_ID --features toml
+  fi
 matrix:
-  include:
-    - os: osx
-    - os: linux
-    - rust: stable
-    - rust: beta
-    - rust: nightly
-
-    - name: "Coverage"
-      rust: nightly
-      before_cache: RUSTFLAGS="--cfg procmacro2_semver_exempt" cargo install -f cargo-tarpaulin
-      after_success: cargo tarpaulin --ciserver travis-ci --coveralls $TRAVIS_JOB_ID $ELEFREN_FEATURES
-      env:
-        - ELEFREN_FEATURES="--features all"
-
-    - name: "rustfmt"
-      rust: nightly
-      before_script: rustup component add rustfmt-preview
-      script: cargo fmt --all -- check
-
   allow_failures:
     - rust: nightly
-
 notifications:
   email:
     on_success: never