Indent code with TABs

We indent with TABs and sometimes for fine alignment, TABs followed by
spaces, but never all spaces (unless the indentation is less than 8
columns). Indenting with spaces slips through in some places. Fix
them.

Imported code and compat/ are left alone on purpose. The former should
remain as close as upstream as possible. The latter pretty much has
separate maintainers, it's up to them to decide.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

convert.c

@@ -705,7 +705,7 @@ static int filter_buffer_or_fd(int in, int out, void *data)
 }
 
 static int apply_single_file_filter(const char *path, const char *src, size_t len, int fd,
-                        struct strbuf *dst, const char *cmd)
+				    struct strbuf *dst, const char *cmd)
 {
 	/*
 	 * Create a pipeline to have the command filter the buffer's
@@ -1091,7 +1091,7 @@ static int count_ident(const char *cp, unsigned long size)
 }
 
 static int ident_to_git(const char *path, const char *src, size_t len,
-                        struct strbuf *buf, int ident)
+			struct strbuf *buf, int ident)
 {
 	char *dst, *dollar;
 
@@ -1135,7 +1135,7 @@ static int ident_to_git(const char *path, const char *src, size_t len,
 }
 
 static int ident_to_worktree(const char *path, const char *src, size_t len,
-                             struct strbuf *buf, int ident)
+			     struct strbuf *buf, int ident)
 {
 	struct object_id oid;
 	char *to_free = NULL, *dollar, *spc;