Fixed some typos and stylistic issues

Author: mikicz

arca/_arca.py

@@ -134,7 +134,7 @@ def null_cache():
         return region
 
     def validate_repo_url(self, repo: str):
-        """ Validates repo URL - if it's a valid git URL and if Arca can handle that type or repo URL
+        """ Validates repo URL - if it's a valid git URL and if Arca can handle that type of repo URL
 
         :raise ValueError: If the URL is not valid
         """

docs/backends.rst

@@ -150,7 +150,7 @@ Then a VM is launched and the image is pulled there from the registry.
 This takes some time when first launching the VM, but if the VM is reused often, the upload/download time is shorted.
 The built images are also not lost when the VM is destroyed.
 
-The backend inherits all the settings of ``DockerBackend`` (**keep_containers_running** is by default ``True``) has these extra settings:
+The backend inherits all the settings of ``DockerBackend`` (**keep_containers_running** is ``True`` by default) and has these extra settings:
 
 * **box**: Vagrant box used in the VM. Either has to have docker version >= 1.8 or not have docker at all, in which case
   it will be installed when spinning up the VM.

setup.py

@@ -48,7 +48,7 @@ def long_description():
         ],
     },
     classifiers=[
-        "Development Status :: 3 - Alpha",
+        "Development Status :: 4 - Beta",
         "Intended Audience :: Developers",
         "License :: OSI Approved :: MIT License",
         "Programming Language :: Python",

tests/common.py

@@ -14,9 +14,9 @@ def return_str_function():
 
 TEST_UNICODE = "Nechť již hříšné saxofony ďáblů rozezvučí síň úděsnými tóny waltzu, tanga a\xa0quickstepu.→"
 
-SECOND_RETURN_STR_FUNCTION = """
+SECOND_RETURN_STR_FUNCTION = f"""
 def return_str_function():
-    return "Nechť již hříšné saxofony ďáblů rozezvučí síň úděsnými tóny waltzu, tanga a\xa0quickstepu.→"
+    return "{TEST_UNICODE}"
 """
 
 ARG_STR_FUNCTION = """