readlinebuffer doc tweak

[Bruno Haible]

Jim Meyering wrote:
> Thanks.  I've checked that in, with some trivial syntactic changes:
> wrap long lines and add 2007 to the list of copyright years in the .h file.

May I commit these doc tweaks?
  - Typo.
  - Better distinction between the number 0, the pointer NULL and the ASCII
    character NUL.

--- lib/linebuffer.c    12 May 2007 15:59:59 -0000      1.22
+++ lib/linebuffer.c    12 May 2007 16:14:38 -0000
@@ -47,9 +47,9 @@
 }
 
 /* Read an arbitrarily long line of text from STREAM into LINEBUFFER.
-   Consder lines to be terminated by DELIMITER.
+   Consider lines to be terminated by DELIMITER.
    Keep the delimiter; append DELIMITER if it's the last line of a file
-   that ends in a character other than DELIMITER.  Do not null terminate.
+   that ends in a character other than DELIMITER.  Do not NUL-terminate.
    Therefore the stream can contain NUL bytes, and the length
    (including the delimiter) is returned in linebuffer->length.
    Return NULL when stream is empty.  Return NULL and set errno upon
--- lib/linebuffer.h    12 May 2007 15:59:59 -0000      1.16
+++ lib/linebuffer.h    12 May 2007 16:14:38 -0000
@@ -37,15 +37,15 @@
 /* Read an arbitrarily long line of text from STREAM into LINEBUFFER.
    Consider lines to be terminated by DELIMITER.
    Keep the delimiter; append DELIMITER if we reach EOF and it wasn't
-   the last character in the file.  Do not null terminate.
-   Return LINEBUFFER, except at end of file return 0.  */
+   the last character in the file.  Do not NUL-terminate.
+   Return LINEBUFFER, except at end of file return NULL.  */
 struct linebuffer *readlinebuffer_delim (struct linebuffer *linebuffer,
                                         FILE *stream, char delimiter);
 
 /* Read an arbitrarily long line of text from STREAM into LINEBUFFER.
    Keep the newline; append a newline if it's the last line of a file
-   that ends in a non-newline character.  Do not null terminate.
-   Return LINEBUFFER, except at end of file return 0.  */
+   that ends in a non-newline character.  Do not NUL-terminate.
+   Return LINEBUFFER, except at end of file return NULL.  */
 struct linebuffer *readlinebuffer (struct linebuffer *linebuffer, FILE 
*stream);
 
 /* Free linebuffer LINEBUFFER and its data, all allocated with malloc. */