Typo in .gitmodules

Author: OlivierBlanvillain

.gitmodules

@@ -28,7 +28,7 @@
 	path = community-build/community-projects/squants
 	url = https://github.com/dotty-staging/squants
 [submodule "community-build/community-projects/collection-strawman"]
-	path = community-build/community-projects/collection-strawman/
+	path = community-build/community-projects/collection-strawman
 	url = https://github.com/dotty-staging/collection-strawman
 [submodule "community-build/community-projects/scalap"]
 	path = community-build/community-projects/scalap

.travis.yml

@@ -1,3 +1,4 @@
+sudo: false
 language: scala
 jdk: oraclejdk8
 jobs:
@@ -19,3 +20,14 @@ jobs:
     - script: sbt "testOnly -- *stdLib213"
     - script: sbt "testOnly -- *pdbp"
     - script: sbt "testOnly -- *sourcecode"
+
+cache:
+  directories:
+    - $HOME/.ivy2/cache
+    - $HOME/.sbt
+
+before_cache:
+  # Cleanup the cached directories to avoid unnecessary cache updates
+  - rm -fv $HOME/.ivy2/.sbt.ivy.lock
+  - find $HOME/.ivy2/cache -name "ivydata-*.properties" -print -delete
+  - find $HOME/.sbt        -name "*.lock"               -print -delete