Open Radar

 
Summary:
After selecting to the end of a line, Shift-Left should shrink the selection from the end. Instead, it extends it from the beginning.

Steps to Reproduce:
1. Click anywhere in the middle of a line in a source code document.
2. Hit Shift-Command-Right to select from the insertion point to the end of the line.
3. Hit Shift-Left.

Expected Results:
The selection should shrink by one character from the end.

Actual Results:
The selection grows by one character from the beginning.

Regression:
New bug in 7.3 beta, and this behavior is contrary to the standard text editing behavior on OS X.

Notes:
The wrong thing also happens when extending to the beginning of a line via Shift-Command-Left and then hitting Shift-Right, though this is a far less common operation (at least for me).

Unexpectedly, the correct behavior is restored if you perform step 2 twice before performing step 3.