grepg [WP]: reorganize usage information

provide brief list of options in order of description of options

src/green/grepg/grepg.f

@@ -243,21 +243,21 @@ c  give basic information
       print *,'               ',
      &'       [-d dev] [-G file] [-F file] [-ff file]'
       print *,'               ',
-     &'       [-R|I] [-L] [-p p] [-E]'
+     &'       [-R|I] [-L] [-C] [-a a,g] [-Pr]'
       print *,'               ',
-     &'       [-C] [-a a,g] [-Pr] [-O i,m,s]'
+     &'       [-E] [-p p] [-L] [-e limit] [-m limit]'
       print *,'               ',
-     &'       [-S] [-t n,m] [-Q] [-K o,t]'
+     &'       [-s] [-f n] [-st] [-N c,w] [-n value] [-M limit]'
       print *,'               ',
-     &'       [-s] [-st] [-f n] [-N c,w]'
+     &'       [-S] [-t n,m] [-Q] [-K o,t]'
       print *,'               ',
-     &'       [-n value] [-M limit] [-e limit] [-m limit]'
+     &'       [-q] [-g] [-l w] [-H ch] [-W] [-b w] [-Fc r,g,b,w]'
       print *,'               ',
-     &'       [-q] [-g] [-l w] [-H ch] [-W] [-b w] [-c] [-Fc r,g,b,w]'
+     &'       [-i] [-O i,m,s]'
       print *,'               ',
      &'       [-T title] [-Ta anno] [-X label] [-Y label] [-A label]'
       print *,'               ',
-     &'       [-Ah h] [-B label] [-x r,g,b] [-y r,g,b] [-h] [-i]'
+     &'       [-Ah h] [-B label] [-x r,g,b] [-y r,g,b] [-h]'
       print *,'               ',
      &'       [-FC n] [-Fl n] [-Ww w]'
       print *,'               ',