Documentation: clean up a few misspelled word typos

Used GNU "aspell check <filename>" to review various documentation
files with the default aspell dictionary. Ignored false-positives
between american and british english.

Signed-off-by: Jacob Stopak <jacob@initialcommit.io>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/MyFirstContribution.txt

@@ -1160,7 +1160,7 @@ all named like `v2-000n-my-commit-subject.patch`. `-v2` will also format
 your patches by prefixing them with "[PATCH v2]" instead of "[PATCH]",
 and your range-diff will be prefaced with "Range-diff against v1".
 
-Afer you run this command, `format-patch` will output the patches to the `psuh/`
+After you run this command, `format-patch` will output the patches to the `psuh/`
 directory, alongside the v1 patches. Using a single directory makes it easy to
 refer to the old v1 patches while proofreading the v2 patches, but you will need
 to be careful to send out only the v2 patches. We will use a pattern like

Documentation/MyFirstObjectWalk.txt

@@ -534,7 +534,7 @@ the arguments to `traverse_commit_list()`.
 - `void *show_data`: A context buffer which is passed in turn to `show_commit`
   and `show_object`.
 
-In addition, `traverse_commit_list_filtered()` has an additional paramter:
+In addition, `traverse_commit_list_filtered()` has an additional parameter:
 
 - `struct oidset *omitted`: A linked-list of object IDs which the provided
   filter caused to be omitted.

Documentation/git.txt

@@ -344,7 +344,7 @@ Repository, command and file interfaces
 
 This documentation discusses repository and command interfaces which
 users are expected to interact with directly. See `--user-formats` in
-linkgit:git-help[1] for more details on the critera.
+linkgit:git-help[1] for more details on the criteria.
 
 include::cmds-userinterfaces.txt[]