Low Description
SourceTree appears to not honor git config alias.wdiff. Git diff reports no data in the terminal view when lines exceed 2048 bytes. SourceTree itself is showing complete line diffs even with this alias set.
Reproduce is simple, create a valid XML file, with a significant sized line, 4Kb or above, with no trailing \n (Excel worksheet, for example) but long lines. Change one attribute value. The entire line is reported as -/+ in Source tree and is not reported in the terminal window.