8341833: incomplete snippet from loaded files from command line is ignored

[lahodaj]

If JShell is run with a parameter that is a file, and the file ends with an incomplete snippet, the incomplete snippet is ignored.

For example:

t.jsh:
class {

 jshell  /tmp/t.jsh
|  Welcome to JShell -- Version 21.0.5
|  For an introduction type: /help intro

jshell>

This PR proposes to produce an explicit error in this case:

$ jshell /tmp/t.jsh 
Building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
Finished building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
Incomplete input: class {
|  Welcome to JShell -- Version 25-internal
|  For an introduction type: /help intro

jshell>

---

Progress

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Warning

 ⚠️ Found leading lowercase letter in issue title for 8341833: incomplete snippet from loaded files from command line is ignored

Issue

• JDK-8341833: incomplete snippet from loaded files from command line is ignored (Bug - P3)

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