Review feedback: tests, style fixes, and docs

Add tests for two code paths flagged in review:
- test_phd_extracted_without_comma: covers fix_phd() extracting "Ph. D."
  from names without a comma (e.g. "John Smith Ph. D.")
- test_roman_numeral_suffix_not_in_suffix_list: covers the is_roman_numeral(nxt)
  branch for VI-X, which are not in the suffix word lists and so are not caught
  by are_suffixes() first

Other changes:
- Replace list[T]() constructor style with typed annotations (list: T = [])
  in parser.py — same runtime behavior, idiomatic Python
- Add LGPL license classifier to pyproject.toml (was present in setup.py)
- Note pip >= 24.1 requirement for --group dev in CONTRIBUTING.md and AGENTS.md

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: derek73

AGENTS.md

@@ -5,7 +5,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 ## Commands
 
 ```bash
-# Install dev dependencies
+# Install dev dependencies (requires pip >= 24.1)
 pip install --group dev
 
 # Run all tests

CONTRIBUTING.md

@@ -4,7 +4,7 @@ Contributing
 Development Environment Setup
 --------------------------------
 
-Install dev dependencies:
+Install dev dependencies (requires pip >= 24.1 for dependency group support):
 
     pip install --group dev
 

nameparser/parser.py

@@ -19,7 +19,7 @@ def group_contiguous_integers(data: Iterable[int]) -> list[tuple[int, int]]:
     return list of tuples containing first and last index
     position of contiguous numbers in a series
     """
-    ranges = list[tuple[int, int]]()
+    ranges: list[tuple[int, int]] = []
     for key, group_with_indices in groupby(enumerate(data), lambda i: i[0] - i[1]):
         group = list(map(itemgetter(1), group_with_indices))
         if len(group) > 1:
@@ -755,7 +755,7 @@ def parse_pieces(self, parts: Iterable[str], additional_parts_count: int = 0) ->
         :rtype: list
         """
 
-        output = list[str]()
+        output: list[str] = []
         for part in parts:
             if not isinstance(part, (str, bytes)):
                 raise TypeError("Name parts must be strings. "
@@ -822,7 +822,7 @@ def join_on_conjunctions(self, pieces: list[str], additional_parts_count: int =
 
         contiguous_conj_i = group_contiguous_integers(conj_index)
 
-        delete_i = list[int]()
+        delete_i: list[int] = []
         for cont_i in contiguous_conj_i:
             new_piece = " ".join(pieces[cont_i[0]: cont_i[1]+1])
             delete_i += list(range(cont_i[0]+1, cont_i[1]+1))

pyproject.toml

@@ -9,6 +9,7 @@ dynamic = ["version"]
 keywords = ["names", "parser"]
 classifiers = [
   "Intended Audience :: Developers",
+  "License :: OSI Approved :: GNU Library or Lesser General Public License (LGPL)",
   "Operating System :: OS Independent",
   "Programming Language :: Python",
   "Programming Language :: Python :: 3",

tests.py

@@ -1267,6 +1267,14 @@ def test_roman_numeral_initials(self) -> None:
         self.m(hn.last, "I", hn)
         self.m(hn.suffix, "", hn)
 
+    def test_roman_numeral_suffix_not_in_suffix_list(self) -> None:
+        # VI-X are not in the suffix word lists, so they reach the
+        # is_roman_numeral(nxt) branch rather than are_suffixes()
+        hn = HumanName("John Smith VI")
+        self.m(hn.first, "John", hn)
+        self.m(hn.last, "Smith", hn)
+        self.m(hn.suffix, "VI", hn)
+
     # tests for Rev. title (Reverend)
     def test124(self) -> None:
         hn = HumanName("Rev. John A. Kenneth Doe")
@@ -1784,6 +1792,12 @@ def test_phd_with_erroneous_space(self) -> None:
         self.m(hn.last, "Smith", hn)
         self.m(hn.suffix, "Ph. D.", hn)
 
+    def test_phd_extracted_without_comma(self) -> None:
+        hn = HumanName("John Smith Ph. D.")
+        self.m(hn.first, "John", hn)
+        self.m(hn.last, "Smith", hn)
+        self.m(hn.suffix, "Ph. D.", hn)
+
     def test_phd_conflict(self) -> None:
         hn = HumanName("Adolph D")
         self.m(hn.first, "Adolph", hn)