Typo in NEWS section "New in 1.17" and "New in 1.15"

[Hans Ulrich Niedermann]

While reading the announcement for 1.16i, I found a typo in the
NEWS file "New in 1.17" section.

I have also accidentally found a typo in the "New in 1.15"
section, which might need a line rewrap after the fix.

I have not systematically looked for typos in any of the
"New in ..." sections older than 1.17.

diff --git a/NEWS b/NEWS
index 5b56a7283..384be5e94 100644
--- a/NEWS
+++ b/NEWS
@@ -51,7 +51,7 @@ New in 1.17:
     filesystem that supports sub-second resolution; otherwise, we fall
     back to one-second granularity as before. When everything is
     supported, a new line `Features: subsecond-mtime' is printed by
-    automake --version (and autom4mte --version). (bug#64756, bug#67670)
+    automake --version (and autom4te --version). (bug#64756, bug#67670)
 
   - The default value of $ARFLAGS is now "cr" instead of "cru", to better
     support deterministic builds. (bug#20082)
@@ -386,7 +386,7 @@ New in 1.15:
         include $(srcdir)/fragment.am
         ...
 
-    If the use forgot to add data.txt and/or preproc.sh in the distribution
+    If the user forgot to add data.txt and/or preproc.sh in the distribution
     tarball, "make distcheck" would have erroneously succeeded!  This issue
     is now fixed.