three minor spelling fixes

doc/implementation_notes.md

@@ -6,7 +6,7 @@ Lightweight cleaning mode
 
 Due to *popular* request, MAT2 is providing a *lightweight* cleaning mode,
 that only cleans the superficial metadata of your file, but not
-the ones that might be in **embeded** resources. Like for example,
+the ones that might be in **embedded** resources. Like for example,
 images in a PDF or an office document.
 
 Revisions handling

libmat2/abstract.py

@@ -6,8 +6,8 @@ assert Set  # make pyflakes happy
 
 
 class AbstractParser(abc.ABC):
-    """ This is the base classe of every parser.
-    It might yield `ValueError` on instanciation on invalid files.
+    """ This is the base class of every parser.
+    It might yield `ValueError` on instantiation on invalid files.
     """
     meta_list = set()  # type: Set[str]
     mimetypes = set()  # type: Set[str]

mat2

@@ -68,7 +68,7 @@ def show_meta(filename: str):
             print("  %s: harmful content" % k)
 
 def clean_meta(params: Tuple[str, bool]) -> bool:
-    filename, is_lightweigth = params
+    filename, is_lightweight = params
     if not __check_file(filename, os.R_OK|os.W_OK):
         return False
 
@@ -76,7 +76,7 @@ def clean_meta(params: Tuple[str, bool]) -> bool:
     if p is None:
         print("[-] %s's format (%s) is not supported" % (filename, mtype))
         return False
-    if is_lightweigth:
+    if is_lightweight:
         return p.remove_all_lightweight()
     return p.remove_all()