headers: normalize the spelling of some header guards

Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

alias.h

@@ -1,5 +1,5 @@
-#ifndef __ALIAS_H__
-#define __ALIAS_H__
+#ifndef ALIAS_H
+#define ALIAS_H
 
 struct string_list;
 

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"
 

fetch-negotiator.h

@@ -1,5 +1,5 @@
-#ifndef FETCH_NEGOTIATOR
-#define FETCH_NEGOTIATOR
+#ifndef FETCH_NEGOTIATOR_H
+#define FETCH_NEGOTIATOR_H
 
 struct commit;
 

midx.h

@@ -1,5 +1,5 @@
-#ifndef __MIDX_H__
-#define __MIDX_H__
+#ifndef MIDX_H
+#define MIDX_H
 
 #include "repository.h"
 

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"
 

vcs-svn/fast_export.h

@@ -1,5 +1,5 @@
-#ifndef FAST_EXPORT_H_
-#define FAST_EXPORT_H_
+#ifndef FAST_EXPORT_H
+#define FAST_EXPORT_H
 
 struct strbuf;
 struct line_buffer;

vcs-svn/line_buffer.h

@@ -1,5 +1,5 @@
-#ifndef LINE_BUFFER_H_
-#define LINE_BUFFER_H_
+#ifndef LINE_BUFFER_H
+#define LINE_BUFFER_H
 
 #include "strbuf.h"
 

vcs-svn/sliding_window.h

@@ -1,5 +1,5 @@
-#ifndef SLIDING_WINDOW_H_
-#define SLIDING_WINDOW_H_
+#ifndef SLIDING_WINDOW_H
+#define SLIDING_WINDOW_H
 
 #include "strbuf.h"
 

vcs-svn/svndiff.h

@@ -1,5 +1,5 @@
-#ifndef SVNDIFF_H_
-#define SVNDIFF_H_
+#ifndef SVNDIFF_H
+#define SVNDIFF_H
 
 struct line_buffer;
 struct sliding_view;

vcs-svn/svndump.h

@@ -1,5 +1,5 @@
-#ifndef SVNDUMP_H_
-#define SVNDUMP_H_
+#ifndef SVNDUMP_H
+#define SVNDUMP_H
 
 int svndump_init(const char *filename);
 int svndump_init_fd(int in_fd, int back_fd);