Fix spelling errors in comments

Change-Id: Icc8f26d8df00e52ef10781c91071356daa799afa

etc/oslo-rootwrap/rootwrap.conf

@@ -7,7 +7,7 @@
 filters_path=/etc/oslo-rootwrap/filters.d,/usr/share/oslo-rootwrap
 
 # List of directories to search executables in, in case filters do not
-# explicitely specify a full path (separated by ',')
+# explicitly specify a full path (separated by ',')
 # If not specified, defaults to system PATH environment variable.
 # These directories MUST all be only writeable by root !
 exec_dirs=/sbin,/usr/sbin,/bin,/usr/bin

oslo/rootwrap/filters.py

@@ -174,7 +174,7 @@ class KillFilter(CommandFilter):
             return False
 
         # NOTE(yufang521247): /proc/PID/exe may have '\0' on the
-        # end, because python doen't stop at '\0' when read the
+        # end, because python doesn't stop at '\0' when read the
         # target path.
         command = command.partition('\0')[0]
 

oslo/rootwrap/wrapper.py

@@ -71,7 +71,7 @@ class RootwrapConfig(object):
             v = config.get("DEFAULT", "syslog_log_level")
             self.syslog_log_level = logging.getLevelName(v.upper())
             if (self.syslog_log_level == "Level %s" % v.upper()):
-                raise ValueError('Unexepected syslog_log_level: %s' % v)
+                raise ValueError('Unexpected syslog_log_level: %s' % v)
         else:
             self.syslog_log_level = logging.ERROR