Do not mistake subdivisions with "Island" in their name with Iceland.

This is because Iceland spells Island in German, and this has precedence
over subdivision detection.

CHANGELOG.md

@@ -19,6 +19,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - All tests pass, no warning
 - Detection for "Congo Democratic Republic" as CG (without "of" in the end)
 - Do not mistake "Haute-Vienne" French department with the Austrian capital name "Vienne" (in French)
+- Do not mistake "Prince Edward Island" (Canadian province) and "Rhode Island" (US state)
+  with Iceland (which spells Island in German).
 
 ### Upgrade
 

geoconvert/data/countries.py

@@ -32,8 +32,10 @@
     "south sudan": "SS",  # en
     "sudsudan": "SS",  # de
     "sudan del sur": "SS",  # es
-    # Make sure we never mistake some countries for IS (Iceland)
+    # Make sure we never mistake some countries or subdivisions for IS (Iceland)
     # We would mistake them because Iceland spells Island in German.
+    "prince edward island": "CA",  # en
+    "rhode island": "US",  # en
     "bouvet island": "BV",  # en
     "christmas island": "CX",  # en
     "heard island": "HM",  # en

tests/test_countries.py

@@ -57,6 +57,8 @@ class TestCountries:
             ("Heard Island", {}, "HM"),  # en
             ("Norfolk Island", {}, "NF"),  # en
             ("Solomon Islands", {}, "SB"),  # en
+            ("Prince Edward Island", {}, "CA"),  # en
+            ("Rhode Island", {}, "US"),  # en
             # However, in cases where island is singular instead of plural,
             # there can be confusion.
             ("Solomon Island Nationals", {}, "IS"),  # en

tests/test_subdivisions/test_subdivisions_without_countries.py

@@ -48,6 +48,9 @@ class TestNoCountryProvided:
             ("2 pl. Saint-Pierre, 44000 Nantes", {"country": "FR"}, "44"),
             ("2 pl. Saint-Pierre, 44000 Nantes, France", {}, "44"),
             ("2 pl. Saint-Pierre, 44000 Nantes, France", {"country": "FR"}, "44"),
+            # No mistakes with Iceland (IS)
+            ("Prince Edward Island", {}, "PE"),
+            ("Rhode Island", {}, "RI"),
         ],
     )
     def test_address_to_subdivision_code(self, input_data, kwargs, expected):
@@ -95,6 +98,9 @@ def test_address_to_subdivision_code(self, input_data, kwargs, expected):
                 {},
                 ("AT", None),  # Precedence goes to the French capital name for Austria
             ),
+            # No mistakes with Iceland (IS)
+            ("Prince Edward Island", {}, ("CA", "PE")),
+            ("Rhode Island", {}, ("US", "RI")),
         ],
     )
     def test_address_to_country_and_subdivision_code(