doc: fix typos in documentation and release notes

Signed-off-by: Karthikeyan Singaravelan <tir.karthi@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/RelNotes/1.7.11.7.txt

@@ -25,7 +25,7 @@ Fixes since v1.7.11.6
    references" nor "Reload" did not update what is shown as the
    contents of it, when the user overwrote the tag with "git tag -f".
- * "git for-each-ref" did not currectly support more than one --sort
+ * "git for-each-ref" did not correctly support more than one --sort
    option.
  * "git log .." errored out saying it is both rev range and a path

Documentation/RelNotes/2.17.0.txt

@@ -342,7 +342,7 @@ Fixes since v2.16
    validate the data and connected-ness of objects in the received
    pack; the code to perform this check has been taught about the
    narrow clone's convention that missing objects that are reachable
-   from objects in a pack that came from a promissor remote is OK.
+   from objects in a pack that came from a promisor remote is OK.
  * There was an unused file-scope static variable left in http.c when
    building for versions of libCURL that is older than 7.19.4, which

Documentation/RelNotes/2.18.0.txt

@@ -324,7 +324,7 @@ Fixes since v2.17
    after giving an error message.
    (merge 3bb0923f06 ps/contains-id-error-message later to maint).
- * "diff-highlight" filter (in contrib/) learned to undertand "git log
+ * "diff-highlight" filter (in contrib/) learned to understand "git log
    --graph" output better.
    (merge 4551fbba14 jk/diff-highlight-graph-fix later to maint).

Documentation/diff-options.txt

@@ -133,7 +133,7 @@ These parameters can also be set individually with `--stat-width=<width>`,
 	as file creations or deletions ("new" or "gone", optionally "+l"
 	if it's a symlink) and mode changes ("+x" or "-x" for adding
 	or removing executable bit respectively) in diffstat. The
-	information is put betwen the filename part and the graph
+	information is put between the filename part and the graph
 	part. Implies `--stat`.
 --numstat::