strbuf.h: unify documentation comments beginnings

The prior patch uses "/**" to denote "documentation"
comments that we pulled from api-strbuf.txt. Let's use a
consistent style for similar comments that were already in
strbuf.h.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

strbuf.h

@@ -435,7 +435,7 @@ static inline int strbuf_strip_suffix(struct strbuf *sb, const char *suffix)
 		return 0;
 }
 
-/*
+/**
  * Split str (of length slen) at the specified terminator character.
  * Return a null-terminated array of pointers to strbuf objects
  * holding the substrings.  The substrings include the terminator,
@@ -451,7 +451,7 @@ static inline int strbuf_strip_suffix(struct strbuf *sb, const char *suffix)
 extern struct strbuf **strbuf_split_buf(const char *, size_t,
 					int terminator, int max);
 
-/*
+/**
  * Split a NUL-terminated string at the specified terminator
  * character.  See strbuf_split_buf() for more information.
  */
@@ -461,7 +461,7 @@ static inline struct strbuf **strbuf_split_str(const char *str,
 	return strbuf_split_buf(str, strlen(str), terminator, max);
 }
 
-/*
+/**
  * Split a strbuf at the specified terminator character.  See
  * strbuf_split_buf() for more information.
  */
@@ -471,7 +471,7 @@ static inline struct strbuf **strbuf_split_max(const struct strbuf *sb,
 	return strbuf_split_buf(sb->buf, sb->len, terminator, max);
 }
 
-/*
+/**
  * Split a strbuf at the specified terminator character.  See
  * strbuf_split_buf() for more information.
  */
@@ -481,7 +481,7 @@ static inline struct strbuf **strbuf_split(const struct strbuf *sb,
 	return strbuf_split_max(sb, terminator, 0);
 }
 
-/*
+/**
  * Free a NULL-terminated list of strbufs (for example, the return
  * values of the strbuf_split*() functions).
  */
@@ -498,7 +498,7 @@ extern int launch_editor(const char *path, struct strbuf *buffer, const char *co
 
 extern void strbuf_add_lines(struct strbuf *sb, const char *prefix, const char *buf, size_t size);
 
-/*
+/**
  * Append s to sb, with the characters '<', '>', '&' and '"' converted
  * into XML entities.
  */
@@ -523,7 +523,7 @@ extern int fprintf_ln(FILE *fp, const char *fmt, ...);
 
 char *xstrdup_tolower(const char *);
 
-/*
+/**
  * Create a newly allocated string using printf format. You can do this easily
  * with a strbuf, but this provides a shortcut to save a few lines.
  */