Clarify list_add documentation

[SimonLiu423]

Originally, the function list_add is said to insert a node at the beginning of a given list.
However, it could also be used to insert a node after any existing node in the list.

Therefore, this pr modifies its documentation to reflect the actual list manipulation performed by the function.

[jserv]

Why did you close this pull request?

[SimonLiu423]

I intended to sync my branch with the master branch on Github, but it then removes my commit and closed this pr automatically.

[jserv]

I intended to sync my branch with the master branch on Github, but it then removes my commit and closed this pr automatically.

Use git rebase -i to rework your commits. Then, do git push --force.

[SimonLiu423]

I intended to sync my branch with the master branch on Github, but it then removes my commit and closed this pr automatically.

Use git rebase -i to rework your commits. Then, do git push --force.

I've reworked my commits already, please review. 😄

[jserv]

I've reworked my commits already, please review. 😄

You don't have to leave the message for reviewing. Instead, check Requesting a pull request review:

• request a review from a suggested person under Reviewers
• Navigate to Reviewers in the right sidebar and click next to the reviewer's name whose review you'd like

[jserv]

Drop the statement "The checksum of list.h is also updated." to emphasize on the documentation revision.

[SimonLiu423]

I've reworked my commits already, please review. 😄

You don't have to leave the message for reviewing. Instead, check Requesting a pull request review:

• request a review from a suggested person under Reviewers
• Navigate to Reviewers in the right sidebar and click next to the reviewer's name whose review you'd like

Got it, thanks!

[jserv]

Thank @SimonLiu423 for contributing!