docs: fix typos in comments, docstrings and CLI help text

docs/index.md

@@ -44,7 +44,7 @@ migration-lint --loader=local_git --extractor=<your extractor>
 ```
 
 It will examine files in current repository that are added or modified
-and not yet commited.
+and not yet committed.
 
 ### GitLab
 

migration_lint/analyzer/base.py

@@ -26,7 +26,7 @@ def lint(
         migration_sql: str,
         changed_files: List[ExtendedSourceDiff],
     ) -> List[str]:
-        """Perform SQL migartion linting."""
+        """Perform SQL migration linting."""
 
         raise NotImplementedError()
 

migration_lint/django/management/commands/migration_lint.py

@@ -33,7 +33,7 @@ def add_arguments(self, parser):
             dest="gitlab_instance",
             type=str,
             default=os.getenv("CI_SERVER_URL"),
-            help="GitLab instance instance (protocol://host:port)",
+            help="GitLab instance (protocol://host:port)",
         )
         parser.add_argument(
             "--project-id",

migration_lint/extractor/base.py

@@ -31,7 +31,7 @@ def __new__(
             # Not the base class.
             if not hasattr(cls, "NAME"):
                 raise NotImplementedError(
-                    f"extractor {cls.__name__} doesn't provie name",
+                    f"extractor {cls.__name__} doesn't provide name",
                 )
 
             mcls.extractors[cls.NAME] = cls

migration_lint/extractor/model.py

@@ -20,7 +20,7 @@ class Migration:
 
 @dataclass
 class ExtendedSourceDiff(SourceDiff):
-    """An object desribing a single changed file.
+    """An object describing a single changed file.
 
     - `path` -- the path to the file;
     - `old_path` -- the previous path to the file; differs from `path` if the

migration_lint/main.py

@@ -38,7 +38,7 @@
 )
 @click.option(
     "--gitlab-instance",
-    help="GitLab instance instance (protocol://host:port)",
+    help="GitLab instance (protocol://host:port)",
     default=os.getenv("CI_SERVER_URL"),
 )
 @click.option(