better message on setLabel error

Author: q3769

src/main/java/q3769/maven/plugins/semver/mojos/CalendarNormalVersionIncrementer.java

@@ -60,7 +60,7 @@ public static Version calendarIncrement(Version original, NormalVersion selected
       }
     }
     throw new IllegalArgumentException(String.format(
-        "%s version %s in POM semver %s is not supported for calendar style increment - it has to be older than current date in UTC zone",
+        "%s version %s in original semver %s is not supported for calendar style increment - it has to be older than current date in UTC zone",
         selectedNormalVersion, selectedNormalVersionNumber, original));
   }
 

src/main/java/q3769/maven/plugins/semver/mojos/UpdatePreRelease.java

@@ -52,7 +52,7 @@ protected Version doSetLabel(Version version, String label) throws MojoFailureEx
     try {
       return version.nextPreReleaseVersion(label);
     } catch (Exception e) {
-      getLog().error(String.format("Failed to set pre-release label for %s", version), e);
+      getLog().error(String.format("Failed to set pre-release label: %s", label), e);
       throw new MojoFailureException(e);
     }
   }

src/test/java/q3769/maven/plugins/semver/mojos/UpdatePreReleaseTest.java

@@ -69,7 +69,8 @@ void throwsExceptionWhenSettingInvalidLabel() {
           .willThrow(new IllegalStateException("Invalid label"));
 
       MojoFailureException exception = assertThrows(
-          MojoFailureException.class, () -> updatePreRelease.setLabel(version, "invalid"));
+          MojoFailureException.class,
+          () -> updatePreRelease.setLabel(version, "test-invalid-label"));
 
       assertThat(exception.getCause())
           .isInstanceOf(IllegalStateException.class)