add --prefer-source to composer install as test files needed from por…

…tphp/portphp (#2)
portphp · Jan 7, 2018 · 3d29b4d · 3d29b4d
1 parent 1a00e36
commit 3d29b4d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -32,7 +32,7 @@ $ git checkout -b bug-or-feature-description
 And install the dependencies:
 
 ```bash
-$ composer install
+$ composer install --prefer-source
 ```
 
 Write your code and add tests. Then run the tests: