[processing] exclude commented R libraries when generating dependencies list (fix #14143)

Author: alexbruy

python/plugins/processing/algs/r/RUtils.py

@@ -201,7 +201,7 @@ def checkRIsInstalled(ignoreRegistrySettings=False):
 
     @staticmethod
     def getRequiredPackages(code):
-        regex = re.compile('library\("?(.*?)"?\)')
+        regex = re.compile('[^#]library\("?(.*?)"?\)')
         return regex.findall(code)
 
     @staticmethod