Fix a few I18n minor issues.

gerbview/job_file_reader.cpp

@@ -145,7 +145,7 @@ bool GERBER_JOBFILE_READER::ReadGerberJobFile()
     else
     {
         if( m_reporter )
-            m_reporter->ReportTail( _( "This job file uses an outdated format. Please, recreate it" ),
+            m_reporter->ReportTail( _( "This job file uses an outdated format. Please, recreate it." ),
                                 REPORTER::RPT_WARNING );
 
         return false;

pcbnew/dialogs/dialog_position_relative.cpp

@@ -190,7 +190,7 @@ void DIALOG_POSITION_RELATIVE::UpdateAnchor( EDA_ITEM* aItem )
         reference = aItem->GetSelectMenuText( GetUserUnits() );
     }
 
-    m_referenceInfo->SetLabel( _( "Reference item: " ) + reference );
+    m_referenceInfo->SetLabel( wxString::Format( "Reference item: %s", reference ) );
 
     Show( true );
 }

pcbnew/kicad_plugin.cpp

@@ -1272,8 +1272,7 @@ void PCB_IO::format( D_PAD* aPad, int aNestLevel ) const
     case PAD_ATTRIB_HOLE_NOT_PLATED:   type = "np_thru_hole";   break;
 
     default:
-        THROW_IO_ERROR( wxString::Format( _( "unknown pad attribute: %d" ),
-                                          aPad->GetAttribute() ) );
+        THROW_IO_ERROR( wxString::Format( "unknown pad attribute: %d", aPad->GetAttribute() ) );
     }
 
     m_out->Print( aNestLevel, "(pad %s %s %s",