--- a/doc/interpreter/signal.txi
+++ b/doc/interpreter/signal.txi
@@ -19,18 +19,23 @@
 @node Signal Processing
 @chapter Signal Processing
 
-
 This chapter describes the signal processing and fast Fourier
 transform functions available in Octave.  Fast Fourier transforms are
 computed with the @sc{fftw} or @sc{fftpack} libraries depending on how
 Octave is built.
- 
-
-
-@DOCSTRING(detrend)
 
 @DOCSTRING(fft)
 
+@DOCSTRING(ifft)
+
+@DOCSTRING(fft2)
+
+@DOCSTRING(ifft2)
+
+@DOCSTRING(fftn)
+
+@DOCSTRING(ifftn)
+
 Octave uses the @sc{fftw} libraries to perform FFT computations.  When Octave
 starts up and initializes the @sc{fftw} libraries, they read a system wide
 file (on a Unix system, it is typically @file{/etc/fftw/wisdom}) that
@@ -45,16 +50,6 @@
 
 @DOCSTRING(fftw)
 
-@DOCSTRING(ifft)
-
-@DOCSTRING(fft2)
-
-@DOCSTRING(ifft2)
-
-@DOCSTRING(fftn)
-
-@DOCSTRING(ifftn)
-
 @DOCSTRING(fftconv)
 
 @DOCSTRING(fftfilt)
@@ -71,7 +66,7 @@
 
 @DOCSTRING(unwrap)
 
-@c FIXME -- someone needs to organize these...
+@c FIXME: someone needs to organize these ...
 
 @DOCSTRING(arch_fit)
 
@@ -87,6 +82,8 @@
 
 @DOCSTRING(blackman)
 
+@DOCSTRING(detrend)
+
 @DOCSTRING(diffpara)
 
 @DOCSTRING(durbinlevinson)
@@ -107,10 +104,6 @@
 
 @DOCSTRING(periodogram)
 
-@DOCSTRING(rectangle_lw)
-
-@DOCSTRING(rectangle_sw)
-
 @DOCSTRING(sinetone)
 
 @DOCSTRING(sinewave)
@@ -125,8 +118,5 @@
 
 @DOCSTRING(synthesis)
 
-@DOCSTRING(triangle_lw)
+@DOCSTRING(yulewalker)
 
-@DOCSTRING(triangle_sw)
-
-@DOCSTRING(yulewalker)