Use assq instead of assoc for :keywords

Use assq instead of assoc for :keywords

* lisp/ob-C.el (org-babel-C-execute):
* lisp/ob-J.el (org-babel-execute:J):
* lisp/ob-R.el (org-babel-edit-prep:R):
(org-babel-expand-body:R):
(org-babel-execute:R):
(org-babel-variable-assignments:R):
(org-babel-R-initiate-session):
* lisp/ob-abc.el (org-babel-execute:abc):
* lisp/ob-asymptote.el (org-babel-execute:asymptote):
* lisp/ob-awk.el (org-babel-execute:awk):
* lisp/ob-clojure.el (org-babel-expand-body:clojure):
(org-babel-execute:clojure):
* lisp/ob-core.el (org-babel-expand-body:generic):
(org-babel-load-in-session):
(org-babel-initiate-session):
(org-babel-open-src-block-result):
(org-babel-process-params):
(org-babel-insert-result):
(org-babel-expand-noweb-references):
* lisp/ob-ditaa.el (org-babel-execute:ditaa):
* lisp/ob-dot.el (org-babel-execute:dot):
* lisp/ob-ebnf.el (org-babel-execute:ebnf):
* lisp/ob-emacs-lisp.el (org-babel-expand-body:emacs-lisp):
(org-babel-execute:emacs-lisp):
* lisp/ob-exp.el (org-babel-exp-process-buffer):
(org-babel-exp-do-export):
(org-babel-exp-code):
* lisp/ob-forth.el (org-babel-execute:forth):
* lisp/ob-fortran.el (org-babel-execute:fortran):
* lisp/ob-gnuplot.el (org-babel-gnuplot-process-vars):
(org-babel-expand-body:gnuplot):
(org-babel-execute:gnuplot):
* lisp/ob-groovy.el (org-babel-execute:groovy):
* lisp/ob-haskell.el (org-babel-execute:haskell):
* lisp/ob-io.el (org-babel-execute:io):
* lisp/ob-java.el (org-babel-execute:java):
* lisp/ob-js.el (org-babel-execute:js):
* lisp/ob-latex.el (org-babel-execute:latex):
* lisp/ob-ledger.el (org-babel-execute:ledger):
* lisp/ob-lilypond.el (org-babel-lilypond-process-basic):
* lisp/ob-lisp.el (org-babel-expand-body:lisp):
(org-babel-execute:lisp):
* lisp/ob-lua.el (org-babel-execute:lua):
* lisp/ob-maxima.el (org-babel-execute:maxima):
* lisp/ob-mscgen.el (org-babel-execute:mscgen):
* lisp/ob-ocaml.el (org-babel-execute:ocaml):
* lisp/ob-octave.el (org-babel-execute:octave):
* lisp/ob-org.el (org-babel-execute:org):
* lisp/ob-perl.el (org-babel-execute:perl):
* lisp/ob-picolisp.el (org-babel-execute:picolisp):
* lisp/ob-plantuml.el (org-babel-execute:plantuml):
* lisp/ob-python.el (org-babel-execute:python):
* lisp/ob-ruby.el (org-babel-execute:ruby):
* lisp/ob-sass.el (org-babel-execute:sass):
* lisp/ob-scala.el (org-babel-execute:scala):
* lisp/ob-scheme.el (org-babel-execute:scheme):
* lisp/ob-screen.el (org-babel-execute:screen):
(org-babel-prep-session:screen):
* lisp/ob-shell.el (org-babel-execute:shell):
(org-babel-variable-assignments:shell):
(org-babel-sh-evaluate):
* lisp/ob-shen.el (org-babel-execute:shen):
* lisp/ob-sql.el (org-babel-execute:sql):
* lisp/ob-sqlite.el (org-babel-execute:sqlite):
* lisp/ob-tangle.el (org-babel-tangle):
(org-babel-tangle-single-block):
* lisp/org-src.el (org-src-associate-babel-session):
* lisp/org.el (org-next-link):
Use `assq' instead of `assoc' with :keyword keys.