manual.m4: Fix a typo.

diff --git a/web/manual.m4 b/web/manual.m4
index f9b0fb51ebf6c30e83c3b7b5efdb50020fbaf9eb..0ff7e9b73af974d4db454a00eea12ac0755fd6ec 100644 (file)
--- a/web/manual.m4
+++ b/web/manual.m4
@@ -1536,11 +1536,10 @@ and compress quite expensive in terms of computing power.
 
 *amp*
 
-The amp filter which amplifies the audio stream by a fixed scaling
-factor that must be known in advance. For para_audiod this factor is
-derived from the amplification field of the audio file's entry in
-the audio file table while para_filter uses the value given at the
-command line.
+The amp filter amplifies the audio stream by a fixed scaling factor
+that must be known in advance. For para_audiod this factor is derived
+from the amplification field of the audio file's entry in the audio
+file table while para_filter uses the value given at the command line.
 
 The optimal scaling factor F for an audio file is the largest real
 number F >= 1 such that after multiplication with F all samples still