Fix spelling errors in documentation outside of Documentation/

Reported-by: Jens Schleusener <Jens.Schleusener@fossies.org>
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

INSTALL

@@ -109,7 +109,7 @@ Issues of note:
 
  - Git is reasonably self-sufficient, but does depend on a few external
    programs and libraries.  Git can be used without most of them by adding
-   the approriate "NO_<LIBRARY>=YesPlease" to the make command line or
+   the appropriate "NO_<LIBRARY>=YesPlease" to the make command line or
    config.mak file.
 
 	- "zlib", the compression library. Git won't build without it.

contrib/hooks/update-paranoid

@@ -49,7 +49,7 @@ opcode.
 Repository sections are matched on the basename of the repository
 (after removing the .git suffix).
 
-The opcode abbrevations are:
+The opcode abbreviations are:
 
   C: create new ref
   D: delete existing ref

perl/Git.pm

@@ -563,7 +563,7 @@ sub get_record {
 Query user C<PROMPT> and return answer from user.
 
 Honours GIT_ASKPASS and SSH_ASKPASS environment variables for querying
-the user. If no *_ASKPASS variable is set or an error occoured,
+the user. If no *_ASKPASS variable is set or an error occurred,
 the terminal is tried as a fallback.
 If C<ISPASSWORD> is set and true, the terminal disables echo.