Whitespace gardening in jerry-libc (#2082)

Also includes the addition and styling of some doc comments (but
those are whitespace too).

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

jerry-libc/jerry-libc-printf.c

@@ -120,6 +120,9 @@ libc_printf_justified_string_output (FILE *stream, /**< stream pointer */
 
 /**
  * printf helper function that converts unsigned integer to string
+ *
+ * @return start of the string representation (within the output string buffer
+ *         but not necessarily at its start)
  */
 static char *
 libc_printf_uint_to_string (uintmax_t value, /**< integer value */
@@ -717,9 +720,9 @@ vfprintf (FILE *stream, /**< stream pointer */
  * @return number of characters printed
  */
 int
-fprintf (FILE *stream,      /**< stream pointer */
+fprintf (FILE *stream, /**< stream pointer */
          const char *format, /**< format string */
-         ...)                /**< parameters' values */
+         ...) /**< parameters' values */
 {
   va_list args;
 
@@ -739,7 +742,7 @@ fprintf (FILE *stream,      /**< stream pointer */
  */
 int
 printf (const char *format, /**< format string */
-        ...)                /**< parameters' values */
+        ...) /**< parameters' values */
 {
   va_list args;
 
@@ -751,4 +754,3 @@ printf (const char *format, /**< format string */
 
   return ret;
 } /* printf */
-