Coords: version prefix (:) is removed if has version but toString'ed with empty version

Author: host6

src/main/java/org/scm4j/commons/Coords.java

@@ -111,11 +111,11 @@ public Version getVersion() {
 
 	@Override
 	public String toString() {
-		return toString(version.toString());
+		return getName() + verPrefix + version.toString() + verSuffix + classifier + extension + commentStr;
 	}
 
 	public String toString(String versionStr) {
-		String str = verPrefix.isEmpty() && !versionStr.isEmpty() ? ":" : verPrefix;
+		String str = verPrefix.isEmpty() && !versionStr.isEmpty() ? ":" : verSuffix.isEmpty() && versionStr.isEmpty() ? "" : verPrefix;
 		str += versionStr + verSuffix + classifier + extension;
 		return getName() + str + commentStr;
 	}

src/test/java/org/scm4j/commons/CoordsTest.java

@@ -92,7 +92,7 @@ public void testVersionChange() {
 		assertEquals("eu.untill:JTerminal:12.13:abc@efg # comment", new Coords("eu.untill:JTerminal::abc@efg # comment").toString("12.13"));
 		assertEquals("eu.untill:JTerminal::abc@efg # comment", new Coords("eu.untill:JTerminal:12.13:abc@efg # comment").toString(""));
 		assertEquals("eu.untill:JTerminal::# comment", new Coords("eu.untill:JTerminal:12.13:# comment").toString(""));
-		assertEquals("eu.untill:JTerminal:  # comment", new Coords("eu.untill:JTerminal:12.13  # comment").toString(""));
+		assertEquals("eu.untill:JTerminal  # comment", new Coords("eu.untill:JTerminal:12.13  # comment").toString(""));
 		assertEquals("eu.untill:JTerminal  # comment", new Coords("eu.untill:JTerminal  # comment").toString(""));
 		assertEquals("eu.untill:JTerminal:12.13  # comment", new Coords("eu.untill:JTerminal  # comment").toString("12.13"));
 	}