Assumption: a fluid command should be prefixed with \ when executed in MongoShell

Based on the assumption above, made the following changes (SVN r32583, 14.0.0-alpha-24):
(1) Change the default of CLI_SHELL_LINE_INTERPRETER_EVAL_IMPLICIT_CMD shell variable from true to false:
    so that 'cat' won't be interpreted as '\cat'.
(2) Change the default of CLI_SHELL_LINE_INTERPRETER_PERFORM_ALIAS_EXPANSION shell variable from true to false:
    so that alias expansion will NOT be applied to the first word on the command line if that word is NOT prefixed with \ character.

Assumption: ADS will not allow user to switch FluidShell to/from MongoShell

If assumption above is correct, we might want to review the list of shell variables currently created in FluidShell and MongoShell:

FluidShell:
   prompt> set
*  CLI_SHELL_LINE_EXECUTE_JAVASCRIPT_IMMEDIATELY=false
*  CLI_SHELL_LINE_EXECUTE_SQL_AS_JAVASCRIPT=false
   CLI_SHELL_LINE_INTERPRETER_ERROR_ON_EXPLICIT_CMD_NOT_FOUND=true
   CLI_SHELL_LINE_INTERPRETER_EVAL_COMMENT=sql
   CLI_SHELL_LINE_INTERPRETER_EVAL_EXPLICIT_CMD=true
   CLI_SHELL_LINE_INTERPRETER_EVAL_EXPLICIT_SQL=false
   CLI_SHELL_LINE_INTERPRETER_EVAL_HISTORY=true
   CLI_SHELL_LINE_INTERPRETER_EVAL_IMPLICIT_CMD=true
   CLI_SHELL_LINE_INTERPRETER_EXPLICIT_CMD_CHAR=\
   CLI_SHELL_LINE_INTERPRETER_EXPLICIT_SQL_CHAR=;
   CLI_SHELL_LINE_INTERPRETER_IMPLICIT_BEHAVIOR=sql
   CLI_SHELL_LINE_INTERPRETER_IS_AT_SIGN_GO=true
   CLI_SHELL_LINE_INTERPRETER_IS_FORWARDSLASH_GO=true
   CLI_SHELL_LINE_INTERPRETER_IS_SEMICOLON_GO=false
   CLI_SHELL_LINE_INTERPRETER_PERFORM_ALIAS_EXPANSION=true
*  CLI_SHELL_LINE_JAVASCRIPT_API=aqua
If a FluidShell cannot be switched to a MongoShell, why we want to create javascript specific variables (marked with *) in FluidShell?

MongoShell:
   prompt> \set
   CLI_SHELL_LINE_EXECUTE_JAVASCRIPT_IMMEDIATELY=true
   CLI_SHELL_LINE_EXECUTE_SQL_AS_JAVASCRIPT=true
   CLI_SHELL_LINE_INTERPRETER_ERROR_ON_EXPLICIT_CMD_NOT_FOUND=true
?  CLI_SHELL_LINE_INTERPRETER_EVAL_COMMENT=sql
   CLI_SHELL_LINE_INTERPRETER_EVAL_EXPLICIT_CMD=true
*  CLI_SHELL_LINE_INTERPRETER_EVAL_EXPLICIT_SQL=false
   CLI_SHELL_LINE_INTERPRETER_EVAL_HISTORY=true
   CLI_SHELL_LINE_INTERPRETER_EVAL_IMPLICIT_CMD=false
   CLI_SHELL_LINE_INTERPRETER_EXPLICIT_CMD_CHAR=\
*  CLI_SHELL_LINE_INTERPRETER_EXPLICIT_SQL_CHAR=;
?  CLI_SHELL_LINE_INTERPRETER_IMPLICIT_BEHAVIOR=sql
*  CLI_SHELL_LINE_INTERPRETER_IS_AT_SIGN_GO=false
*  CLI_SHELL_LINE_INTERPRETER_IS_FORWARDSLASH_GO=false
*  CLI_SHELL_LINE_INTERPRETER_IS_SEMICOLON_GO=true
   CLI_SHELL_LINE_INTERPRETER_PERFORM_ALIAS_EXPANSION=false
   CLI_SHELL_LINE_JAVASCRIPT_API=mongo
If a MongoShell cannot be switched to a FluidShell, why SQL specific variables (marked with *) are presented in MongoShell?  And, some of variables (marked with ?) probably do not apply, either (e.g. comments will always be evaluated in javascript style, and implicit behavior is always javascript).

The problem described by this issue was fixed on 5/25/13, 14.0.0-alpha-24. For list of shell variables, it seems that Niels prefers to keeping the way it is for now.

Verified in 14.0.0-beta-76