Rephrased the OSX stack limit problem, after a complaint about it.

README

@@ -396,9 +396,10 @@ Reliant UNIX: The thread support does not compile on Reliant UNIX, and
         platform as well.  This should be resolved in time for a
         future release.
 
-Mac OS X 10: One of the regular expression tests fails
-        with a SEGV due to the small stack size used by default, if you do
-        "limit stacksize 2048" before "make test" it should work.
+Mac OS X 10: One of the regular expression tests fails with a segmentation 
+        violation (SIGSEGV) due to the small stack size used by default,
+        if you give the command "limit stacksize 2048" before "make test"
+        it should work.
 
         On naked Darwin you may want to add the configure option
         "--disable-toolbox-glue" to disable the glue code for the Carbon
@@ -406,7 +407,7 @@ Mac OS X 10: One of the regular expression tests fails
         if you add the --enable-framework option, see below.
 
         On a clean OSX /usr/local does not exist. Do a
-	"sudo mkdir -m 775 /usr/local"
+        "sudo mkdir -m 775 /usr/local"
         before you do a make install. Alternatively, do "sudo make install"
         which installs everything as superuser.