remove regex extras, fix http share links

sopel_reddit/__init__.py

@@ -33,7 +33,7 @@
     r'(?:/r/\S+?)?/comments/(?P<submission>[\w-]+)'
     r'(?:/?(?:[\w%]+/(?P<comment>[\w-]+))?)'
 )
-share_url = r'https?://(?:www\.)?reddit\.com/r/\S+?/s/(?P<share>[\w-]+)'
+share_url = r'https?://(?:www\.)?reddit\.com/r/\S+?/s/\w+'
 short_post_url = r'https?://(redd\.it|reddit\.com)/(?P<submission>[\w-]+)/?$'
 user_url = r'%s/u(?:ser)?/([\w-]+)' % domain
 image_url = r'https?://(?P<subdomain>i|preview)\.redd\.it/(?:[\w%]+-)*(?P<image>[^-?\s]+)'
@@ -161,14 +161,18 @@ def video_info(bot, trigger, match):
 @plugin.url(share_url)
 @plugin.output_prefix(PLUGIN_OUTPUT_PREFIX)
 def share_info(bot, trigger):
+    url = str(trigger)
+    if url.startswith("http:"):
+        url = "https:" + url[5:]
     redirect_response = requests.get(
-        trigger, allow_redirects=False, headers={"User-Agent": USER_AGENT}
+        url, allow_redirects=False, headers={"User-Agent": USER_AGENT}
     )
     if redirect_response.status_code != 301:
         return
     real_url = redirect_response.headers["location"]
     match = re.match(post_or_comment_url, real_url)
-    post_or_comment_info(bot, trigger, match, force_link=True)
+    if match:
+        post_or_comment_info(bot, trigger, match, force_link=True)
 
 
 @plugin.url(post_or_comment_url)
@@ -296,7 +300,7 @@ def say_comment_info(bot, trigger, id_, show_link=False):
     # DIY shortish-link, since c.permalink is both long and not a link
     link = ""
     if show_link:
-        link = "https://reddit.com/comments/{}/c/{}/ | ".format(
+        link = "https://reddit.com/comments/{}/c/{} | ".format(
             c.link_id[3:],  # strip t3_ prefix
             c.id
         )