Add more comments about Knuth-Morris-Pratt algorithm.

[pspp] / ChangeLog

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+2007-12-23  Bruno Haible  <bruno@clisp.org>
+
+       * lib/c-strcasestr.c: Add more comments.
+       * lib/c-strstr.c: Likewise.
+       * lib/mbscasestr.c: Likewise.
+       * lib/mbsstr.c: Likewise.
+       * lib/strcasestr.c: Likewise.
+       * lib/memmem.c: Likewise.
+
 2007-12-23  Bruno Haible  <bruno@clisp.org>
 
        * tests/test-memmem.c: Include <string.h> first.