Fixing the process output parsing.

README.md

@@ -46,6 +46,13 @@ On any project within the build:
 
 ### Publishing a Release
 
+If the `release` property is set, a release build will be produced. The valid
+values for `release` are:
+
+- `major`
+- `minor`
+- `patch`
+
 ```
 sbt -Drelease=minor publish
 ```

src/main/scala/gs/Git.scala

@@ -33,8 +33,11 @@ object Git {
 
     if (result.exitCode != 0)
       SemVer.DefaultVersion
-    else
+    else {
-      SemVer.parse(result.out.text()).getOrElse(SemVer.DefaultVersion)
+      // Note: this value may contain newlines!
+      val processOutput = result.out.text().trim()
+      SemVer.parse(processOutput).getOrElse(SemVer.DefaultVersion)
+    }
   }
 
 }