Fix some minor formatting issues

libmat2/archive.py

@@ -21,7 +21,7 @@ class ArchiveBasedAbstractParser(abstract.AbstractParser):
 
     # Those are the files that we _do not_ want to keep,
     # no matter if they are supported or not.
-    files_to_omit = set() # type: Set[Pattern]
+    files_to_omit = set()  # type: Set[Pattern]
 
     # what should the parser do if it encounters an unknown file in
     # the archive?

libmat2/office.py

@@ -21,7 +21,7 @@ def _parse_xml(full_path: str):
     for _, (key, value) in ET.iterparse(full_path, ("start-ns", )):
         # The ns[0-9]+ namespaces are reserved for interal usage, so
         # we have to use an other nomenclature.
-        if re.match('^ns[0-9]+$', key, re.I):  #pragma: no cover
+        if re.match('^ns[0-9]+$', key, re.I):  # pragma: no cover
             key = 'mat' + key[2:]
 
         namespace_map[key] = value

libmat2/pdf.py

@@ -17,7 +17,7 @@ from gi.repository import Poppler, GLib
 from . import abstract
 
 poppler_version = Poppler.get_version()
-if LooseVersion(poppler_version) < LooseVersion('0.46'): # pragma: no cover
+if LooseVersion(poppler_version) < LooseVersion('0.46'):  # pragma: no cover
     raise ValueError("MAT2 needs at least Poppler version 0.46 to work. \
 The installed version is %s." % poppler_version)  # pragma: no cover