cosmetics: Reformat comment paragraph and fix a few typos in it.

Originally committed as revision 18383 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/ppc/idct_altivec.c

@@ -21,17 +21,17 @@
 /*
  * NOTE: This code is based on GPL code from the libmpeg2 project.  The
  * author, Michel Lespinasses, has given explicit permission to release
- * under LGPL as part of ffmpeg.
+ * under LGPL as part of FFmpeg.
  */
 
 /*
- * FFMpeg integration by Dieter Shirley
+ * FFmpeg integration by Dieter Shirley
  *
- * This file is a direct copy of the altivec idct module from the libmpeg2
- * project.  I've deleted all of the libmpeg2 specific code, renamed the functions and
- * re-ordered the function parameters.  The only change to the IDCT function
- * itself was to factor out the partial transposition, and to perform a full
- * transpose at the end of the function.
+ * This file is a direct copy of the AltiVec IDCT module from the libmpeg2
+ * project.  I've deleted all of the libmpeg2-specific code, renamed the
+ * functions and reordered the function parameters.  The only change to the
+ * IDCT function itself was to factor out the partial transposition, and to
+ * perform a full transpose at the end of the function.
  */