[newlib-cygwin] Cygwin: fix typo

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=49ea15ef17fda59cc279a59141c9b78cd9b9a3c1

commit 49ea15ef17fda59cc279a59141c9b78cd9b9a3c1
Author: Corinna Vinschen <corinna@vinschen.de>
Date:   Sat Feb 2 21:15:50 2019 +0100

    Cygwin: fix typo
    
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 winsup/doc/utils.xml | 2 +-
 winsup/utils/kill.cc | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/winsup/doc/utils.xml b/winsup/doc/utils.xml
index 0909d11..043ed73 100644
--- a/winsup/doc/utils.xml
+++ b/winsup/doc/utils.xml
@@ -693,7 +693,7 @@ kill -l [signal]
  -l, --list      print a list of signal names
  -s, --signal    send signal (use kill --list for a list)
  -W, --winpid    specified pids are windows PIDs, not Cygwin PIDs
-                 (use with extrem caution!)
+                 (use with extreme caution!)
  -h, --help      output usage information and exit
  -V, --version   output version information and exit
 </screen>
diff --git a/winsup/utils/kill.cc b/winsup/utils/kill.cc
index 7905c4e..768ac44 100644
--- a/winsup/utils/kill.cc
+++ b/winsup/utils/kill.cc
@@ -46,7 +46,7 @@ usage (FILE *where = stderr)
 	" -l, --list      print a list of signal names\n"
 	" -s, --signal    send signal (use %1$s --list for a list)\n"
 	" -W, --winpid    specified pids are windows PIDs, not Cygwin PIDs\n"
-	"                 (use with extrem caution!)\n"
+	"                 (use with extreme caution!)\n"
 	" -h, --help      output usage information and exit\n"
 	" -V, --version   output version information and exit\n"
 	"\n", prog_name);