Minimize the usage of temporary variables

[tokoro10g]

Although it is unlikely to cause name conflicts, the usage of temporary variables should be reduced or encapsulated.

For example, these lines should be improved:

matlab-langserver/src/main/java/org/tokor/lspmatlab/MATLABTextDocumentService.java

Lines 72 to 76 in bfac637

	String rs = (String) MATLABEngineSingleton.getInstance().evalInMATLAB("import com.mathworks.jmi.tabcompletion.*;" +
	"tc___ = TabCompletionImpl();" +
	"f___ = tc___.getJSONCompletions(str___, " + Integer.toString(byteIndex) + ");" +
	"while ~f___.isDone(); pause(0.01); end;" +
	"result___ = f___.get();", "str___", src, "result___");