CRAN check fail: `maxima.load("abs_integrate")` on Fedora

[rcst]

Running examples using the above function on package "abs_integrate" results in an error:

checking examples ... [14s/24s] ERROR
Running examples in ‘rim-Ex.R’ failed
The error most likely occurred in:

> ### Name: rim-package
> ### Title: rim
> ### Aliases: rim rim-package maxima.start maxima.stop maxima.get
> ###   maxima.load maxima.apropos maxima.version maxima.isInstalled iprint
> ###   print.maxima maxima.eval
> 
> ### ** Examples
> 
> if(maxima.isInstalled()) maxima.start(restart = TRUE)
> if(maxima.isInstalled()) {
+   maxima.start(restart = TRUE)
+   maxima.stop()
+ }
> if(maxima.isInstalled()) maxima.get("2+2;")
> if(maxima.isInstalled()) maxima.load("abs_integrate")
Error in self$get(paste0("load(\"", module, "\")$")) : 
  TEXT;>>file_search1: <<TEXT;
 -- an error. To debug this try: debugmode(true);
Calls: maxima.load -> <Anonymous> -> <Anonymous>
Execution halted

Perhaps one way to mitigate this error is to run file_seach() first

[rcst]

Alternatively, perhaps a more consistent interface design would be to remove maxima.load() and enable to switch to a direct Maxima prompt (similar to how it's done in the reticulate package), see this file