i18n: am: mark more strings for translation

Mark strings in 'git-am.sh' for translation. In the last chunk,
change '$1' to '-b/--binary', as it is not worth turning this
message to "The %s option has been..." and using printf on it.

Also reduce one indentation level for one gettextln clause introduced
in commit de88c1c.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Reviewed-by: Stefano Lattarini <stefano.lattarini@gmail.com>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-am.sh

@@ -92,7 +92,7 @@ safe_to_abort () {
 	then
 		return 0
 	fi
-		gettextln "You seem to have moved HEAD since the last 'am' failure.
+	gettextln "You seem to have moved HEAD since the last 'am' failure.
 Not rewinding to ORIG_HEAD" >&2
 	return 1
 }
@@ -136,7 +136,7 @@ fall_back_3way () {
     git write-tree >"$dotest/patch-merge-base+" ||
     cannot_fallback "$(gettext "Repository lacks necessary blobs to fall back on 3-way merge.")"
 
-    say Using index info to reconstruct a base tree...
+    say "$(gettext "Using index info to reconstruct a base tree...")"
 
     cmd='GIT_INDEX_FILE="$dotest/patch-merge-tmp-index"'
 
@@ -176,8 +176,7 @@ It does not apply to blobs recorded in its index.")"
     fi
     git-merge-recursive $orig_tree -- HEAD $his_tree || {
 	    git rerere $allow_rerere_autoupdate
-	    echo Failed to merge in the changes.
-	    exit 1
+	    die "$(gettext "Failed to merge in the changes.")"
     }
     unset GITHEAD_$his_tree
 }
@@ -387,8 +386,8 @@ do
 	-i|--interactive)
 		interactive=t ;;
 	-b|--binary)
-		echo >&2 "The $1 option has been a no-op for long time, and"
-		echo >&2 "it will be removed. Please do not use it anymore."
+		gettextln >&2 "The -b/--binary option has been a no-op for long time, and
+it will be removed. Please do not use it anymore."
 		;;
 	-3|--3way)
 		threeway=t ;;