Combine output lines when checking version

Suggested by @gselzer to work around failure to detect Java version
noted in https://forum.image.sc/t/pyimagej-on-windows-10/107934/11
when JAVA_TOOL_OPTIONS is set

Author: hinerm

src/scyjava/_jvm.py

@@ -98,6 +98,7 @@ def jvm_version() -> str:
     except subprocess.CalledProcessError as e:
         raise RuntimeError("System call to java failed") from e
 
+    output = output.replace('\n', ' ').replace('\r', '')
     m = re.match('.*version "(([0-9]+\\.)+[0-9]+)', output)
     if not m:
         raise RuntimeError(f"Inscrutable java command output:\n{output}")