cosmetic

git-svn-id: https://svn.r-project.org/ESS/trunk@5463 0bbaf3bd-34e0-0310-bf65-c717079852d4
VISIBLY in ess-send-string can be a string, in which case VISIBLY is inserted in user buffer instead of STRING.

git-svn-id: https://svn.r-project.org/ESS/trunk@5464 0bbaf3bd-34e0-0310-bf65-c717079852d4
honor ess-eval-visibly even for source-injected code

git-svn-id: https://svn.r-project.org/ESS/trunk@5465 0bbaf3bd-34e0-0310-bf65-c717079852d4
rewrite source injection in terms of temp files instead of eval(parse(...

git-svn-id: https://svn.r-project.org/ESS/trunk@5466 0bbaf3bd-34e0-0310-bf65-c717079852d4