Make sure items in paket references are trimmed (#63)

src/main/groovy/wooga/gradle/paket/base/utils/internal/PaketUnityReferences.groovy

@@ -30,7 +30,7 @@ class PaketUnityReferences {
         referencesContent.eachLine { line ->
 
             if(!line.empty){
-                nugets << line
+                nugets << line.trim()
             }
         }
     }

src/test/groovy/wooga/gradle/paket/base/utils/internal/PaketUnityReferencesSpec.groovy

@@ -0,0 +1,25 @@
+package wooga.gradle.paket.base.utils.internal
+
+import spock.lang.Shared
+import spock.lang.Specification
+import spock.lang.Unroll
+import wooga.gradle.paket.base.utils.internal.PaketTemplate
+
+class PaketUnityReferencesSpec extends Specification {
+
+    @Unroll
+    def "ensure items are trimmed"() {
+
+        when:
+        def refs = new PaketUnityReferences(content)
+
+        then:
+        refs.nugets == nugets
+
+        where:
+        content               | nugets
+        "A1\nA2\nA3\n"        | ["A1", "A2", "A3"]
+        " A1 \nA2\nA3\n"      | ["A1", "A2", "A3"]
+        " A1 \n A2 \nA3   \n" | ["A1", "A2", "A3"]
+    }
+}