fixes typos

module/common/cli_parser.py

@@ -23,7 +23,7 @@ def parse_command_line(self_description=None):
     Parameters
     ----------
     self_description: str
-        short self description of this program
+        short self-description of this program
 
     Returns
     -------

module/common/misc.py

@@ -15,7 +15,7 @@ def grab(structure=None, path=None, separator=".", fallback=None):
     """
         get data from a complex object/json structure with a
         "." separated path information. If a part of a path
-        is not not present then this function returns the
+        is not present then this function returns the
         value of fallback (default: "None").
 
         example structure:
@@ -38,7 +38,7 @@ def grab(structure=None, path=None, separator=".", fallback=None):
         Parameters
         ----------
         structure: dict, list, object
-            object structure to extract data from
+            an object structure to extract data from
         path: str
             nested path to extract
         separator: str

module/common/support.py

@@ -51,9 +51,9 @@ def perform_ptr_lookups(ips, dns_servers=None):
     Parameters
     ----------
     ips: list
-        list of IP addresses to look up
+        a list of IP addresses to look up
     dns_servers: list
-        list of DNS servers to use to look up list of IP addresses
+        a list of DNS servers to use to look up list of IP addresses
 
     Returns
     -------