Merge branch 'agene_2266_fix' into 'main'

Generators: add missing + operator in Sherpa_i

Closes AGENE-2266

See merge request atlas/athena!70049

Generators/Sherpa_i/share/common/EW_scheme_sinthetaW_mZ.py

@@ -25,7 +25,7 @@ EW_SCHEME: 22
           if k == 'EW_parameters':
               for key,value in v.items():
                   if key[0] == 'SIN2THETAW':
-                      strpair = '\n' + str(key[0])+'='+str(value) '\n'
+                      strpair = '\n'+str(key[0])+'='+str(value)+'\n'
                       genSeq.Sherpa_i.BaseFragment += strpair
                       break
               break