Fix Newsweek recipe and Implement #2975 (Validation for i/o filenames in ebook-convert)

src/calibre/ebooks/conversion/plumber.py

@@ -53,6 +53,8 @@ class Plumber(object):
         '''
         self.input = os.path.abspath(input)
         self.output = os.path.abspath(output)
+        if self.input == self.output:
+            raise ValueError('Input file is the same as the output file')
         self.log = log
         self.ui_reporter = report_progress
 

src/calibre/web/feeds/recipes/recipe_newsweek.py

@@ -30,6 +30,7 @@ class Newsweek(BasicNewsRecipe):
     remove_tags = [
             {'class':['fwArticle noHr','fwArticle','subinfo','hdlBulletItem','head-content','navbar','link', 'ad', 'sponsorLinksArticle', 'mm-content',
                 'inline-social-links-wrapper', 'email-article',
+                'inlineComponentRight',
                 'comments-and-social-links-wrapper', 'EmailArticleBlock']},
             {'id' : ['footer', 'ticker-data', 'topTenVertical',
                 'digg-top-five', 'mesothorax', 'nw-comments',