Merge branch 'af/tcsh-completion-noclobber' into maint

The tcsh completion writes a bash scriptlet but that would have
failed for users with noclobber set.

* af/tcsh-completion-noclobber:
  git-completion.tcsh: fix redirect with noclobber

contrib/completion/git-completion.tcsh

@@ -41,7 +41,7 @@ if ( ! -e ${__git_tcsh_completion_original_script} ) then
 	exit
 endif
 
-cat << EOF > ${__git_tcsh_completion_script}
+cat << EOF >! ${__git_tcsh_completion_script}
 #!bash
 #
 # This script is GENERATED and will be overwritten automatically.