Polishing.

Report commit summary in log instead of full commit message.

See #166.

release-tools/src/main/java/org/springframework/data/release/git/Commit.java

@@ -16,6 +16,7 @@
 package org.springframework.data.release.git;
 
 import lombok.EqualsAndHashCode;
+import lombok.Getter;
 import lombok.RequiredArgsConstructor;
 
 import java.util.Optional;
@@ -24,12 +25,15 @@ import org.springframework.data.release.issues.Ticket;
 
 /**
  * @author Oliver Gierke
+ * @author Mark Paluch
  */
 @EqualsAndHashCode
 @RequiredArgsConstructor
 public class Commit {
 
 	private final Ticket ticket;
+
+	@Getter
 	private final String summary;
 	private final Optional<String> details;
 

release-tools/src/main/java/org/springframework/data/release/git/GitOperations.java

@@ -647,7 +647,7 @@ public class GitOperations {
 		String author = gitProperties.getAuthor();
 		String email = gitProperties.getEmail();
 
-		logger.log(module, "git commit -m \"%s\" %s --author=\"%s <%s>\"", commit,
+		logger.log(module, "git commit -m \"%s\" %s --author=\"%s <%s>\"", commit.getSummary(),
 				gpg.isGpgAvailable() ? "-S" + gpg.getKeyname() : "", author, email);
 
 		doWithGit(project, git -> {