Better error message when commit not found

Author: tomasbjerre

CHANGELOG.md

@@ -5,7 +5,15 @@ Changelog of Git Changelog.
 ## Next release
 ### Other changes
 
-[6b753199a81f9fb](https://github.com/tomasbjerre/git-changelog-lib/commit/6b753199a81f9fb) Tomas Bjerre *2016-01-31 10:30:01*
+[a10bef4d61b05d3](https://github.com/tomasbjerre/git-changelog-lib/commit/a10bef4d61b05d3) Tomas Bjerre *2016-01-31 12:14:45*
+
+Better error message when commit not found
+
+
+## 1.23
+### Other changes
+
+[a9fc5a30a82c320](https://github.com/tomasbjerre/git-changelog-lib/commit/a9fc5a30a82c320) Tomas Bjerre *2016-01-31 10:30:24*
 
 Sorting tags by committime, not committime formatted string
 

src/main/java/se/bjurr/gitchangelog/internal/git/GitRepo.java

@@ -1,6 +1,5 @@
 package se.bjurr.gitchangelog.internal.git;
 
-import static com.google.common.base.Joiner.on;
 import static com.google.common.base.Objects.firstNonNull;
 import static com.google.common.base.Throwables.propagate;
 import static com.google.common.collect.Iterables.filter;
@@ -94,7 +93,7 @@ public List<GitCommit> getDiff(ObjectId from, ObjectId to) {
 
    return newArrayList(transform(diff, TO_GITCOMMIT));
   } catch (Exception e) {
-   throw new RuntimeException("References:\n" + on("\n").join(getAllRefs().keySet()), e);
+   throw new RuntimeException(toString(), e);
   } finally {
    git.close();
   }