An Attempt To Fix Expression String

[mariuszgromada]

Option to enable and to try to fix incorrect expression string.: example in - #202

[mariuszgromada]

As of now:

• "++" is changed to "+"
• "+-" is changed to "-"
• "-+" is changed to "-"
• "--" is changed to "+"
• If expression string starts with "+" then it is removed
• if expression string ends with "+" or "-" then it is removed

Global - default is enabled:

• mXparser.enableAttemptToFixExpStrMode();
• mXparser.disableAttemptToFixExpStrMode();
• mXparser.checkIfAttemptToFixExpStrMode();

Local assuming Expression e - default is enabled:

• e.enableAttemptToFixExpStrMode();
• e.disableAttemptToFixExpStrMode();
• e.checkIfAttemptToFixExpStrMode();

Best regards