t (mix it with ordinary output), or a file name string.
Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.
-Remaining arguments are strings passed as command arguments to PROGRAM.
+Remaining arguments ARGS are strings passed as command arguments to PROGRAM.
If executable PROGRAM can't be found as an executable, `call-process'
signals a Lisp error. `call-process' reports errors in execution of
t (mix it with ordinary output), or a file name string.
Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.
-Remaining args are passed to PROGRAM at startup as command args.
+Remaining arguments ARGS are passed to PROGRAM at startup as command-line
+arguments.
If BUFFER is 0, `call-process-region' returns immediately with value nil.
Otherwise it waits for PROGRAM to terminate