Addon manager: strip possible whitespaces in dependencies checking

src/Mod/AddonManager/AddonManager.py

@@ -604,14 +604,14 @@ class InstallWorker(QtCore.QThread):
                 if l.startswith("workbenches="):
                     depswb = l.split("=")[1].split(",")
                     for wb in depswb:
-                        if not wb in FreeCADGui.listWorkbenches().keys():
+                        if not wb.strip() in FreeCADGui.listWorkbenches().keys():
                             ok = False
                             message += translate("AddonsInstaller","Missing workbench") + ": " + wb + ", "
                 elif l.startswith("pylibs="):
                     depspy = l.split("=")[1].split(",")
                     for pl in depspy:
                         try:
-                            __import__(pl)
+                            __import__(pl.strip())
                         except:
                             ok = False
                             message += translate("AddonsInstaller","Missing python module") +": " + pl + ", "