Fix linting. Fix collection structure

.flake8

@@ -0,0 +1,3 @@
+[flake8]
+max-line-length = 88
+extend-ignore = E203

README.md

@@ -15,7 +15,7 @@ The UNIX socket file is stored in a temporary folder according to OS.
 Requirements: `python 3`, `pykeepass==4.0.3`
 
     pip install 'pykeepass==4.0.3' --user
-    ansible-galaxy install viczem.keepass
+    ansible-galaxy collection install viczem.keepass
 
 
 ## Variables

meta/runtime.yml

@@ -0,0 +1,2 @@
+requires_ansible: ">=2.10"
+

plugins/lookup/keepass.py

@@ -26,21 +26,21 @@ DOCUMENTATION = """
     version_added: '0.5.0'
     short_description: Fetching data from KeePass file
     description:
-        - This lookup returns a value of a property of a KeePass entry 
+        - This lookup returns a value of a property of a KeePass entry
         - which fetched by given path
     options:
       _terms:
-        description: 
+        description:
           - first is a path to KeePass entry
           - second is a property name of the entry, e.g. username or password
         required: True
     notes:
       - https://github.com/viczem/ansible-keepass
-    
+
     examples:
       - "{{ lookup('keepass', 'path/to/entry', 'username') }}"
       - "{{ lookup('keepass', 'path/to/entry', 'password') }}"
-      - "{{ lookup('keepass', 'path/to/entry', 'custom_properties', 'a_custom_property_name') }}"
+      - "{{ lookup('keepass', 'path/to/entry', 'custom_properties', 'my_prop_name') }}"
 """
 
 
@@ -270,7 +270,7 @@ def _keepass_socket(kdbx, kdbx_key, sock_path, ttl=60, kdbx_password=None):
 
                         if entry is None:
                             conn.send(
-                                _resp("fetch", 1, "path '%s' is not found".format(path))
+                                _resp("fetch", 1, "path '%s' is not found" % path)
                             )
                             break
 
@@ -281,8 +281,7 @@ def _keepass_socket(kdbx, kdbx_key, sock_path, ttl=60, kdbx_password=None):
                                     _resp(
                                         "fetch",
                                         1,
-                                        "custom_property key is not set "
-                                        "for '%s'".format(arg[0]),
+                                        "no custom_property key for '%s'" % arg[0],
                                     )
                                 )
                                 break
@@ -293,8 +292,8 @@ def _keepass_socket(kdbx, kdbx_key, sock_path, ttl=60, kdbx_password=None):
                                     _resp(
                                         "fetch",
                                         1,
-                                        "custom_property '%s' is not found "
-                                        "for '%s'".format(prop_key, path),
+                                        "custom_property '%s' is not found for '%s'"
+                                        "" % (prop_key, path),
                                     )
                                 )
                                 break
@@ -312,7 +311,7 @@ def _keepass_socket(kdbx, kdbx_key, sock_path, ttl=60, kdbx_password=None):
                                 _resp(
                                     "fetch",
                                     1,
-                                    "unknown property '%s' for '%s'".format(prop, path),
+                                    "unknown property '%s' for '%s'" % (prop, path),
                                 )
                             )
                             break