Documentation: typofix

Signed-off-by: NRalf Wildenhues <Ralf.Wildenhues@gmx.de>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Documentation/gitcli.txt

@@ -95,7 +95,7 @@ $ git foo -oArg
 $ git foo -o Arg
 ----------------------------
 
-However, this is *NOT* allowed for switches with an optionnal value, where the
+However, this is *NOT* allowed for switches with an optional value, where the
 'sticked' form must be used:
 ----------------------------
 $ git describe --abbrev HEAD     # correct

Documentation/technical/api-diff.txt

@@ -102,13 +102,13 @@ Notable members are:
 	and copies.
 
 `abbrev`::
-	Number of hexdigits to abbrevate raw format output to.
+	Number of hexdigits to abbreviate raw format output to.
 
 `pickaxe`::
 	A constant string (can and typically does contain newlines to
 	look for a block of text, not just a single line) to filter out
 	the filepairs that do not change the number of strings contained
-	in its preimage and postmage of the diff_queue.
+	in its preimage and postimage of the diff_queue.
 
 `flags`::
 	This is mostly a collection of boolean options that affects the
@@ -149,7 +149,7 @@ REVERSE_DIFF;;
 
 EXIT_WITH_STATUS;;
 	For communication between the calling program and the options
-	parser; tell the calling program to signal the presense of
+	parser; tell the calling program to signal the presence of
 	difference using program exit code.
 
 HAS_CHANGES;;

Documentation/technical/pack-format.txt

@@ -125,7 +125,7 @@ Pack file entry: <+
 
   - A table of 4-byte CRC32 values of the packed object data.
     This is new in v2 so compressed data can be copied directly
-    from pack to pack during repacking withough undetected
+    from pack to pack during repacking without undetected
     data corruption.
 
   - A table of 4-byte offset values (in network byte order).