2014-01-22: fix syntax error in bootstrap.

fix syntax error in bootstrap.

diff --git a/bootstrap.sh b/bootstrap.sh
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -17,7 +17,7 @@ echo preparing the reader: wisp at the R
 echo parsing the spec file...
 mkdir -p language/wisp
 guile wisp.scm ${srcdir}/wisp-reader.w 2>/dev/null > language/wisp/spec.scm \
-    && echo ...precompiling the spec file...
+    && echo ...precompiling the spec file... \
     && guile -L . -s language/wisp/spec.scm \
     && echo ...succeeded \
     && echo 'to use wisp at the REPL, run `guile -L . --language=wisp'