Typo fix: 'comparisions' is not a word

Doc/lib/libdifflib.tex

@@ -55,7 +55,7 @@
 \begin{classdesc*}{HtmlDiff}
 
   This class can be used to create an HTML table (or a complete HTML file
-  containing the table) showing a side by side, line by line comparision
+  containing the table) showing a side by side, line by line comparison
   of text with inter-line and intra-line change highlights.  The table can 
   be generated in either full or contextual difference mode.
 

Doc/lib/libstdtypes.tex

@@ -1092,7 +1092,7 @@ Notes:
   the sorted or reversed list.
 
 \item[(8)] The \method{sort()} method takes optional arguments for
-  controlling the comparisions.
+  controlling the comparisons.
 
   \var{cmp} specifies a custom comparison function of two arguments
      (list items) which should return a negative, zero or positive number

Lib/difflib.py

@@ -1603,7 +1603,7 @@ class HtmlDiff(object):
     """For producing HTML side by side comparison with change highlights.
 
     This class can be used to create an HTML table (or a complete HTML file
-    containing the table) showing a side by side, line by line comparision
+    containing the table) showing a side by side, line by line comparison
     of text with inter-line and intra-line change highlights.  The table can
     be generated in either full or contextual difference mode.
 

Misc/cheatsheet

@@ -248,7 +248,7 @@ is not     negated object identity   (2)
 Notes :
     Comparison behavior can be overridden for a given class by defining special
 method __cmp__.
-    The above comparisions return True or False which are of type bool
+    The above comparisons return True or False which are of type bool
 (a subclass of int) and behave exactly as 1 or 0 except for their type and
 that they print as True or False instead of 1 or 0.
     (1) X < Y < Z < W has expected meaning, unlike C

Objects/listobject.c

@@ -1759,7 +1759,7 @@ merge_compute_minrun(int n)
 }
 
 /* Special wrapper to support stable sorting using the decorate-sort-undecorate
-   pattern.  Holds a key which is used for comparisions and the original record
+   pattern.  Holds a key which is used for comparisons and the original record
    which is returned during the undecorate phase.  By exposing only the key
    during comparisons, the underlying sort stability characteristics are left
    unchanged.  Also, if a custom comparison function is used, it will only see