Fix all wrong instances of "it's".
diff --git a/Lib/difflib.py b/Lib/difflib.py
index 590785f..3558f53 100644
--- a/Lib/difflib.py
+++ b/Lib/difflib.py
@@ -1371,7 +1371,7 @@
text = ' '
# insert marks that won't be noticed by an xml/html escaper.
text = '\0' + format_key + text + '\1'
- # Return line of text, first allow user's line formatter to do it's
+ # Return line of text, first allow user's line formatter to do its
# thing (such as adding the line number) then replace the special
# marks with what the user's change markup.
return (num_lines[side],text)
@@ -1472,7 +1472,7 @@
"""Yields from/to lines of text with a change indication.
This function is an iterator. It itself pulls lines from the line
- iterator. It's difference from that iterator is that this function
+ iterator. Its difference from that iterator is that this function
always yields a pair of from/to text lines (with the change
indication). If necessary it will collect single from/to lines
until it has a matching pair from/to pair to yield.