Const correctness.

src/libcalamares/Job.h

@@ -61,7 +61,7 @@ public:
     explicit Job( QObject* parent = nullptr );
     virtual ~Job();
 
-    virtual QString prettyName() = 0;
+    virtual QString prettyName() const = 0;
     virtual JobResult exec() = 0;
 signals:
     void running( const Calamares::job_ptr& );

src/modules/partition/CreatePartitionJob.cpp

@@ -42,7 +42,7 @@ CreatePartitionJob::CreatePartitionJob( Device* device, Partition* partition )
 }
 
 QString
-CreatePartitionJob::prettyName()
+CreatePartitionJob::prettyName() const
 {
     return tr( "Create partition" ); // FIXME
 }

src/modules/partition/CreatePartitionJob.h

@@ -30,7 +30,7 @@ class CreatePartitionJob : public Calamares::Job
     Q_OBJECT
 public:
     CreatePartitionJob( Device* device, Partition* partition );
-    QString prettyName() override;
+    QString prettyName() const override;
     Calamares::JobResult exec() override;
 
     void updatePreview();

src/modules/partition/DeletePartitionJob.cpp

@@ -31,7 +31,7 @@ DeletePartitionJob::DeletePartitionJob( Device* device, Partition* partition )
 }
 
 QString
-DeletePartitionJob::prettyName()
+DeletePartitionJob::prettyName() const
 {
     return tr( "Delete partition %1" ).arg( m_partition->partitionPath() );
 }

src/modules/partition/DeletePartitionJob.h

@@ -30,7 +30,7 @@ class DeletePartitionJob : public Calamares::Job
     Q_OBJECT
 public:
     DeletePartitionJob( Device* device, Partition* partition );
-    QString prettyName() override;
+    QString prettyName() const override;
     Calamares::JobResult exec() override;
 
     void updatePreview();