Multiple typos and minor inconsistencies across Parts 8-14

Start with the linked course pages for Parts 8.3 through 14.3 and locate their corresponding source content. Apply the listed typo, wording, type-annotation, and output corrections, then review each page to confirm all reported inconsistencies are resolved.

Hi! While going through the Advanced Course in Programming material, I noticed several typos and a few small inconsistencies. I've collected them below by part so they're easier to locate.

Part 8.3 - Defining classes

https://programming-26.mooc.fi/part-8/3-defining-classes

• objecs -> objects

Part 8.5 - More examples of classes

https://programming-26.mooc.fi/part-8/5-more-examples-of-classes

• rectanlge -> rectangle

Part 9.6 - More examples with classes

https://programming-26.mooc.fi/part-9/6-more-examples-with-classes

• Cargo Hold -> CargoHold this refers to the class name, so it should match CargoHold.

Part 10.1 - Class hierarchies

https://programming-26.mooc.fi/part-10/1-class-hierarchies

The Student constructor has this type annotation in two places:

credits: str

It looks like this should be:

credits: int

Part 10.3 - Object oriented programming techniques

https://programming-26.mooc.fi/part-10/3-oo-programming-techniques

There's an inconsistency between the __str__ implementation and the displayed output.

The method is defined as:

def __str__(self):
    return f"{self.__name} (price {self.__price})"

but the displayed output is:

Apple (2.99)
Orange (3.95)

With the given implementation, the output should be:

Apple (price 2.99)
Orange (price 3.95)

(Alternatively, the implementation could be changed if the shorter output is intended.)

Part 10.4 - Application development

https://programming-26.mooc.fi/part-10/4-application-development

• Fo decades -> For decades

Part 11.3 - Recursion

https://programming-26.mooc.fi/part-11/3-recursion

• beacuse -> because

Two more sentences that might be worth reviewing for wording (possibly intentional, just flagging):

• "...which has its own copies of the variables visible." -> maybe "...which has its own copies of the variables shown."
• "returns with a value - it is 1" -> maybe "returns a value, in this case, 1."

Part 12.3 - Functional programming

https://programming-26.mooc.fi/part-12/3-functional-programming

• thrd -> third

Part 13.1 - Pygame

https://programming-26.mooc.fi/part-13/1-pygame

Current: "The file robot.png has to be in the same directory with the source code of the your program..." Suggested: "...with the source code of your program..."

There is no need to add "the" in between "of" and "your"

Part 13.2 - Animation

https://programming-26.mooc.fi/part-13/2-animation

Current text contains 0.01:llä looks like an accidental Finnish suffix left in the English material. Suggested: 0.01, so the sentence reads "With each iteration the size of the angle is incremented by 0.01."

Part 14.2 - Robot and boxes

https://programming-26.mooc.fi/part-14/2-robot-and-boxes

• ANyone -> Anyone
• requiares -> requires
• invlved -> involved

Part 14.3 - Finishing the game

https://programming-26.mooc.fi/part-14/3-finishing-the-game

• ahve -> have
• displaye -> displays
• shanges -> changes
• noification -> notification

Thanks for maintaining the course material!