chore: fix some typos

src/ethereum_spec_tools/forks.py

@@ -206,7 +206,7 @@ def block(self) -> Uint:
     @property
     def timestamp(self) -> U256:
         """
-        Block number of the first block in this hard fork.
+        Timestamp of the first block in this hard fork.
         """
         from ethereum.fork_criteria import ByTimestamp
 

src/ethereum_spec_tools/new_fork/builder.py

@@ -329,7 +329,7 @@ def __init__(
 
         forks = Hardfork.discover()
 
-        # Find the `Hardfork` object named by 'template_fork`.
+        # Find the `Hardfork` object named by `template_fork`.
         before = None
         found = None
         for index, fork in enumerate(forks):

src/ethereum_spec_tools/whitelist/__init__.py

@@ -36,7 +36,7 @@ def find_project_root() -> Path:
 def main() -> int:
     """
     `whitelist` accepts any number of strings, adds them to the whitelist, then
-    sorts the list and maintain visible sections for each leading character.
+    sorts the list and maintains visible sections for each leading character.
 
     Returns:
       - 0 on success