Gammar correction

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18907 a1c6a512-1295-4272-9138-f99709370657
diff --git a/manual/appendix/file_formats.tex b/manual/appendix/file_formats.tex
index bf6d4ac..b118ba8 100644
--- a/manual/appendix/file_formats.tex
+++ b/manual/appendix/file_formats.tex
@@ -84,10 +84,10 @@
     Wavpack & \fname{.wv} & \\
     Shorten & \fname{.shn} & Seeking not supported.\\
     \opt{h1xx,h300,x5,m5,m3}{
-      Monkey's Audio & \fname{.ape, .mac} & -c1000 and -c2000 decodes fast enough to be useful. \\
+      Monkey's Audio & \fname{.ape, .mac} & -c1000 and -c2000 decode fast enough to be useful. \\
     }
     \opt{gigabeat}{
-      Monkey's Audio & \fname{.ape, .mac} & -c1000 to -c3000 decodes fast enough to be useful. \\
+      Monkey's Audio & \fname{.ape, .mac} & -c1000 to -c3000 decode fast enough to be useful. \\
     }
     \\
     \midrule