keg: add function to detect if .app(s) installed.
caveats: print .app caveats if installed to keg.
avidemux: remove duplicated .app caveats.
cppcheck: remove duplicated .app caveats.
djview4: remove duplicated .app caveats.
emacs: remove duplicated .app caveats.
fontforge: remove duplicated .app caveats.
frescobaldi: remove duplicated .app caveats.
graphviz: remove duplicated .app caveats.
jstalk: remove duplicated .app caveats.
macvim: remove duplicated .app caveats.
python: remove duplicated .app caveats.
python3: remove duplicated .app caveats.
qcachegrind: remove duplicated .app caveats.
valkyrie: remove duplicated .app caveats.

Closes #26033.
Revert "Add Formula directory README."

This reverts commit 659aa7cc8e325ecc7ba3aada378a404035988422.
sonar 4.1

Closes #26048.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
jenkins 1.547

Closes #26050.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
youtube-dl 2014.01.20

Closes #26051.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
objc-run 1.4 (new formula)

A shell script that makes it easy to use Objective-C files for shell
script-like tasks.

Closes #25814.
Closes #26052.

References https://github.com/iljaiwas/objc-run/issues/7.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>