The use of operators pairs ( =+, =- or =! ) where the reversed, single operator was meant (+=,
-= or !=) will compile and run, but not produce the expected results.
This rule raises an issue when =+, =-, or =! is used without any spacing between the two operators and when
there is at least one whitespace character after.
Noncompliant Code Example
Integer target = -5;
Integer num = 3;
target =- num; // Noncompliant; target = -3. Is that really what's meant?
target =+ num; // Noncompliant; target = 3
Compliant Solution
Integer target = -5;
Integer num = 3;
target = -num; // Compliant; intent to assign inverse value of num is clear
target += num;
