use only one thread in "Manual_Nits";
the second thread isn't helping much, and might very well be the cause of the Cygwin Isatest failure
--- a/doc-src/Nitpick/nitpick.tex Wed Apr 21 14:02:34 2010 +0200
+++ b/doc-src/Nitpick/nitpick.tex Wed Apr 21 14:46:29 2010 +0200
@@ -1506,7 +1506,7 @@
section were produced with the following settings:
\prew
-\textbf{nitpick\_params} [\textit{max\_potential}~= 0,\, \textit{max\_threads} = 2]
+\textbf{nitpick\_params} [\textit{max\_potential}~= 0]
\postw
\subsection{A Context-Free Grammar}
--- a/src/HOL/Nitpick_Examples/Manual_Nits.thy Wed Apr 21 14:02:34 2010 +0200
+++ b/src/HOL/Nitpick_Examples/Manual_Nits.thy Wed Apr 21 14:46:29 2010 +0200
@@ -337,7 +337,7 @@
section {* 4. Case Studies *}
-nitpick_params [max_potential = 0, max_threads = 2]
+nitpick_params [max_potential = 0]
subsection {* 4.1. A Context-Free Grammar *}