Jamal does *not* start from JShell

[Michael1993]

If you don't have jamal already, you can not start it from JShell with jshell https://git.io/jamal, because it will throw an exception:

[INFO] processing jamal.options
[INFO] URL=https://repo.maven.apache.org/maven2/com/javax0/jamal/jamal-engine/1.4.1/jamal-engine-1.4.1.jar
[INFO] download https://repo.maven.apache.org/maven2/com/javax0/jamal/jamal-engine/1.4.1/jamal-engine-1.4.1.jar
[INFO] to file ~\.m2\repository\com\javax0\jamal\jamal-engine\1.4.1\jamal-engine-1.4.1.jar
Exception java.io.FileNotFoundException: ~\.m2\repository\com\javax0\jamal\jamal-engine\1.4.1\jamal-engine-1.4.1.jar (The system cannot find the path specified)
      at FileOutputStream.open0 (Native Method)
      at FileOutputStream.open (FileOutputStream.java:298)
      at FileOutputStream.<init> (FileOutputStream.java:237)
      at FileOutputStream.<init> (FileOutputStream.java:187)
      at JshBoot.fetch (#12:289)
      at JshBoot.url (#12:269)
      at JshBoot.remoteRepo (#12:242)
      at JshBoot.download (#12:223)
      at JshBoot.artifactId (#12:201)
      at (#24:3)
[INFO] EXECUTING 'java -cp ~\.m2\repository\com\javax0\jamal\jamal-engine\1.4.1\jamal-engine-1.4.1.jar javax0.jamal.cmd.JamalMain pattern=.*\.jam$ exclude= from=\.jam$ to= source=. close=} open={ target=.'
Error: Could not find or load main class javax0.jamal.cmd.JamalMain
Caused by: java.lang.ClassNotFoundException: javax0.jamal.cmd.JamalMain

User specific details omitted.

[verhas]

It was a bug in JshBoot. Fixed, now it works also on Windows.