readit accepts Yes or No option in lowercase (#124)

* readit accepts Yes or No option in lowercase

* added yes in update

* accepts yes in lowercase in the update option

* Fixed some PEP 8 compliants

* Eliminated elif condition for yes/no options

Author: shitalmule04

readit/cli.py

@@ -129,8 +129,8 @@ def option_yes_no(url):
     """
     Asks whether to bookmark invalid URLs or Offline URLs to database.
     """
-    option = input("Still you want to bookmark: Yes/No --> ")
-    if option == "Yes" or option == "Y" or option == "y":
+    option = input("Still you want to bookmark: Yes/No ? ")
+    if option.lower() in ['yes', 'y']:
         database_connection.add_url(url)
     else:
         sys.exit(0)
@@ -140,8 +140,8 @@ def tag_option_yes_no(tag_name, tagged_url):
     """
     Asks whether to tag and bookmark invalid URLs or Offline URLs.
     """
-    option = input("Still you want to update: Yes/No --> ")
-    if option == "Yes" or option == "Y" or option == "y":
+    option = input("Still you want to update: Yes/No ? ")
+    if option.lower() in ['yes', 'y']:
         database_connection.tag_url(tag_name, tagged_url)
     else:
         sys.exit(0)
@@ -151,6 +151,6 @@ def update_option_yes_no(url_id, url):
     """
     Asks whether to update existing bookmark with invalid URLs or Offline URLs
     """
-    option = input("Still you want to update: Yes/No --> ")
-    if option == "Yes" or option == "Y" or option == "y":
+    option = input("Still you want to update: Yes/No ? ")
+    if option.lower() in ['yes', 'y']:
         database_connection.update_url(url_id, url)