Prefer typographic punctuation

For a long time, we’ve not been limited to ASCII and have machines that
can properly render the typographically-correct punctuation symbols for
our languages. This leads to a better, clearer reading experience and
also matches the `<meta charset="utf-8">` and the the use of such
punctuation on FAQs.

Changes:
• Ellipsis: `...` → `…` (https://en.wikipedia.org/wiki/Ellipsis)
• Apostrophe: `'` → `’` (https://en.wikipedia.org/wiki/Apostrophe)

While I could try to do research on other languages, I’m not a native
speaker in them and wouldn’t feel comfortable making any adjustments
outside of English.

locale/translations/en_US.json

@@ -2,7 +2,7 @@
     "confirm.question": "Are you sure?",
     "confirm.yes": "yes",
     "confirm.no": "no",
-    "confirm.loading": "In progress...",
+    "confirm.loading": "In progress…",
     "action.subscribe": "Subscribe",
     "action.save": "Save",
     "action.or": "or",
@@ -48,7 +48,7 @@
     "menu.create_api_key": "Create a new API key",
     "menu.shared_entries": "Shared entries",
     "search.label": "Search",
-    "search.placeholder": "Search...",
+    "search.placeholder": "Search…",
     "pagination.next": "Next",
     "pagination.previous": "Previous",
     "entry.status.unread": "Unread",
@@ -60,8 +60,8 @@
     "entry.bookmark.toggle.off": "Unstar",
     "entry.bookmark.toast.on": "Starred",
     "entry.bookmark.toast.off": "Unstarred",
-    "entry.state.saving": "Saving...",
-    "entry.state.loading": "Loading...",
+    "entry.state.saving": "Saving…",
+    "entry.state.loading": "Loading…",
     "entry.save.label": "Save",
     "entry.save.title": "Save this entry",
     "entry.save.completed": "Done!",
@@ -212,7 +212,7 @@
     "alert.no_category": "There is no category.",
     "alert.no_category_entry": "There are no entries in this category.",
     "alert.no_feed_entry": "There are no entries for this feed.",
-    "alert.no_feed": "You don't have any feeds.",
+    "alert.no_feed": "You don’t have any feeds.",
     "alert.no_feed_in_category": "There is no feed for this category.",
     "alert.no_history": "There is no history at the moment.",
     "alert.feed_error": "There is a problem with this feed",
@@ -223,7 +223,7 @@
     "alert.account_linked": "Your external account is now linked!",
     "alert.pocket_linked": "Your Pocket account is now linked!",
     "alert.prefs_saved": "Preferences saved!",
-    "error.unlink_account_without_password": "You must define a password otherwise you won't be able to login again.",
+    "error.unlink_account_without_password": "You must define a password otherwise you won’t be able to login again.",
     "error.duplicate_linked_account": "There is already someone associated with this provider!",
     "error.duplicate_fever_username": "There is already someone else with the same Fever username!",
     "error.duplicate_googlereader_username": "There is already someone else with the same Google Reader username!",
@@ -363,8 +363,8 @@
     "form.integration.matrix_bot_url": "Matrix server URL",
     "form.integration.matrix_bot_chat_id": "ID of Matrix Room",
     "form.api_key.label.description": "API Key Label",
-    "form.submit.loading": "Loading...",
-    "form.submit.saving": "Saving...",
+    "form.submit.loading": "Loading…",
+    "form.submit.saving": "Saving…",
     "time_elapsed.not_yet": "not yet",
     "time_elapsed.yesterday": "yesterday",
     "time_elapsed.now": "just now",