Fix grammar nits in documentation and in code comments.

Signed-off-by: Jim Meyering <meyering@redhat.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/i18n.txt

@@ -22,7 +22,7 @@ does not forbid it.  However, there are a few things to keep in
 mind.
 
 . `git-commit-tree` (hence, `git-commit` which uses it) issues
-  an warning if the commit log message given to it does not look
+  a warning if the commit log message given to it does not look
   like a valid UTF-8 string, unless you explicitly say your
   project uses a legacy encoding.  The way to say this is to
   have i18n.commitencoding in `.git/config` file, like this:

builtin-blame.c

@@ -606,7 +606,7 @@ static void add_blame_entry(struct scoreboard *sb, struct blame_entry *e)
 
 /*
  * src typically is on-stack; we want to copy the information in it to
- * an malloced blame_entry that is already on the linked list of the
+ * a malloced blame_entry that is already on the linked list of the
  * scoreboard.  The origin of dst loses a refcnt while the origin of src
  * gains one.
  */

ident.c

@@ -152,7 +152,7 @@ static int copy(char *buf, size_t size, int offset, const char *src)
 	/*
 	 * Copy the rest to the buffer, but avoid the special
 	 * characters '\n' '<' and '>' that act as delimiters on
-	 * a identification line
+	 * an identification line
 	 */
 	for (i = 0; i < len; i++) {
 		c = *src++;

merge-recursive.c

@@ -289,7 +289,7 @@ static int get_files_dirs(struct tree *tree)
 }
 
 /*
- * Returns a index_entry instance which doesn't have to correspond to
+ * Returns an index_entry instance which doesn't have to correspond to
  * a real cache entry in Git's index.
  */
 static struct stage_data *insert_stage_data(const char *path,

setup.c

@@ -140,7 +140,7 @@ const char **get_pathspec(const char *prefix, const char **pathspec)
  * Test if it looks like we're at a git directory.
  * We want to see:
  *
- *  - either a objects/ directory _or_ the proper
+ *  - either an objects/ directory _or_ the proper
  *    GIT_OBJECT_DIRECTORY environment variable
  *  - a refs/ directory
  *  - either a HEAD symlink or a HEAD file that is formatted as

sha1_file.c

@@ -148,7 +148,7 @@ static void fill_sha1_path(char *pathbuf, const unsigned char *sha1)
 
 /*
  * NOTE! This returns a statically allocated buffer, so you have to be
- * careful about using it. Do a "xstrdup()" if you need to save the
+ * careful about using it. Do an "xstrdup()" if you need to save the
  * filename.
  *
  * Also note that this returns the location for creating.  Reading