:memo: document when cursor history does sanity checks
:memo: document when cursor history does sanity checks

basarat/tsb,basarat/tsb,alm-tools/alm,TypeScriptBuilder/tsb,alm-tools/alm,alm-tools/alm,basarat/tsb,alm-tools/alm,TypeScriptBuilder/tsb,TypeScriptBuilder/tsb,TypeScriptBuilder/tsb,alm-tools/alm,basarat/tsb