get_shell: use strtrim for portability

Author: scivision

+stdlib/get_shell.m

@@ -7,13 +7,13 @@
   cmd = "(dir 2>&1 *`|echo CMD);&<# rem #>echo ($PSVersionTable).PSEdition";
 else
 % https://askubuntu.com/a/1349538
-  cmd = strcat("lsof -p ", '"$$"', " | grep -m 1 txt | xargs -n 1 | tail -n +9 | tr -d [:space:]");
+  cmd = strcat("lsof -p ", '"$$"', " | grep -m 1 txt | xargs -n 1 | tail -n +9");
 end
 
 [r, msg] = system(cmd);
 
 if r == 0
-  s = msg;
+  s = strtrim(msg);
 else
   s = getenv("SHELL");
 end