[RFC/PATCH] headers: normalize the spelling of some header guards

[Ramsay Jones <ramsay@ramsayjones.plus.com>]

Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
---

Hi Junio,

This patch is marked RFC because I am not aware of any policy with
regard to header guard spelling. Having said that, apart from the
fetch-negotiator.h header, all of these headers are using a reserved
identifier (see C99 Standard 7.1.3).

These headers were found, thus:

  $ git grep -n -E '^#ifn?def ' -- '*.h' | grep 'h\:1\:' | grep -v '^compat' | grep -v -E '[A-Z_]*_H$'
  alias.h:1:#ifndef __ALIAS_H__
  commit-reach.h:1:#ifndef __COMMIT_REACH_H__
  fetch-negotiator.h:1:#ifndef FETCH_NEGOTIATOR
  midx.h:1:#ifndef __MIDX_H__
  t/helper/test-tool.h:1:#ifndef __TEST_TOOL_H__
  vcs-svn/fast_export.h:1:#ifndef FAST_EXPORT_H_
  vcs-svn/line_buffer.h:1:#ifndef LINE_BUFFER_H_
  vcs-svn/sliding_window.h:1:#ifndef SLIDING_WINDOW_H_
  vcs-svn/svndiff.h:1:#ifndef SVNDIFF_H_
  vcs-svn/svndump.h:1:#ifndef SVNDUMP_H_
  $ 

Note that I haven't included the headers in vcs-svn because there is
a patch being discussed which would move that directory to contrib.

ATB,
Ramsay Jones

 alias.h              | 4 ++--
 commit-reach.h       | 4 ++--
 fetch-negotiator.h   | 4 ++--
 midx.h               | 4 ++--
 t/helper/test-tool.h | 4 ++--
 5 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/alias.h b/alias.h
index 79933f2457..aef4843bb7 100644
--- a/alias.h
+++ b/alias.h
@@ -1,5 +1,5 @@
-#ifndef __ALIAS_H__
-#define __ALIAS_H__
+#ifndef ALIAS_H
+#define ALIAS_H
 
 struct string_list;
 
diff --git a/commit-reach.h b/commit-reach.h
index 7d313e2975..122a23a24d 100644
--- a/commit-reach.h
+++ b/commit-reach.h
@@ -1,5 +1,5 @@
-#ifndef __COMMIT_REACH_H__
-#define __COMMIT_REACH_H__
+#ifndef COMMIT_REACH_H
+#define COMMIT_REACH_H
 
 #include "commit-slab.h"
 
diff --git a/fetch-negotiator.h b/fetch-negotiator.h
index ddb44a22dc..9e3967ce66 100644
--- a/fetch-negotiator.h
+++ b/fetch-negotiator.h
@@ -1,5 +1,5 @@
-#ifndef FETCH_NEGOTIATOR
-#define FETCH_NEGOTIATOR
+#ifndef FETCH_NEGOTIATOR_H
+#define FETCH_NEGOTIATOR_H
 
 struct commit;
 
diff --git a/midx.h b/midx.h
index ce80b91c68..ee83702309 100644
--- a/midx.h
+++ b/midx.h
@@ -1,5 +1,5 @@
-#ifndef __MIDX_H__
-#define __MIDX_H__
+#ifndef MIDX_H
+#define MIDX_H
 
 #include "repository.h"
 
diff --git a/t/helper/test-tool.h b/t/helper/test-tool.h
index e4890566da..71f470b871 100644
--- a/t/helper/test-tool.h
+++ b/t/helper/test-tool.h
@@ -1,5 +1,5 @@
-#ifndef __TEST_TOOL_H__
-#define __TEST_TOOL_H__
+#ifndef TEST_TOOL_H
+#define TEST_TOOL_H
 
 #include "git-compat-util.h"
 
-- 
2.19.0