When entering insert mode, don't start editing in the middle of the prompt text.
That is, given:
~/foo/bar> some command
^ ^ ^
A B C
Cursor A will jump to position C but cursor B won't.
Edit by duianto
This also stops the cursor from jumping to the end of the last line,
when entering insert state, from all but the last line in a multi line.
Example:
~/foo/bar>(+
1{cursor in normal state on the 1}
2)
Entering insert state: i
Before:
~/foo/bar>(+
1
2){cursor in insert state after the close parenthesis}
After:
~/foo/bar>(+
{cursor in insert state before the 1}1
2)