[PATCH v2 2/2] docs: add headers in MyFirstObjectWalk

["John Cai via GitGitGadget" <gitgitgadget@gmail.com>]

From: John Cai <johncai86@gmail.com>

In several places, headers need to be included or else the code won't
compile. Since this is the first object walk, it would be nice to
include them in the tutorial to make it easier to follow.

Signed-off-by: John Cai <johncai86@gmail.com>
---
 Documentation/MyFirstObjectWalk.txt | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Documentation/MyFirstObjectWalk.txt b/Documentation/MyFirstObjectWalk.txt
index e22615105c0..ca267941f3e 100644
--- a/Documentation/MyFirstObjectWalk.txt
+++ b/Documentation/MyFirstObjectWalk.txt
@@ -61,6 +61,10 @@ Add usage text and `-h` handling, like all subcommands should consistently do
 We'll need to include the `parse-options.h` header.
 
 ----
+#include "parse-options.h"
+
+...
+
 int cmd_walken(int argc, const char **argv, const char *prefix)
 {
 	const char * const walken_usage[] = {
@@ -200,6 +204,10 @@ Add a new function to `builtin/walken.c`.
 We'll also need to include the `config.h` header:
 
 ----
+#include "config.h"
+
+...
+
 static int git_walken_config(const char *var, const char *value, void *cb)
 {
 	/*
@@ -235,6 +243,10 @@ Add the `struct rev_info` and the `repo_init_revisions()` call.
 We'll also need to include the `revision.h` header:
 
 ----
+#include "revision.h"
+
+...
+
 int cmd_walken(int argc, const char **argv, const char *prefix)
 {
 	/* This can go wherever you like in your declarations.*/
@@ -632,6 +644,10 @@ Complete your implementation of `walken_object_walk()`.
 We'll also need to include the `list-objects.h` header.
 
 ----
+#include "list-objects.h"
+
+...
+
 	traverse_commit_list(rev, walken_show_commit, walken_show_object, NULL);
 
 	printf("commits %d\nblobs %d\ntags %d\ntrees %d\n", commit_count,
-- 
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