sbib improve and rg bool

spdf.sh

@@ -1,18 +1,16 @@
 #!/bin/bash
 if [ "$1" == "-h" ] ; then
     echo "
-        spdf - search for a doi within a pdf. If found, use sdoi.sh to query pubmed, and append bibtex entry with the pdf to your local bib database file
+        spdf - search for a doi within a pdf. If found, print the doi and then use sdoi.sh to query pubmed and append a bibtex entry with the pdf to your local bib database file
 
          usage:
           spdf.sh file.pdf
 
          depends:
           pdftotext - from ghostscript or poppler or texlive ?
-          xsltproc, xmllint - xml programs from libxml
-          pubmed2bibtex.xsl - xml processor stylesheet
 
          defaults:
-          Set the three required default file locations (xsl file, bib file, pdf directory)
+          See sdoi.sh
           "
     exit 0
 fi
@@ -37,6 +35,8 @@ fi
 if [ -z "$doi" ]; then
   echo "doi not found"
   exit 1
+else
+  echo $doi
 fi
 
 sdoi.sh $doi $fn