QA: space around operators

Change-Id: I2bdef3fa09acea7e6e73bf26108dd707b5c19a5c
QA: space after colon

Change-Id: Ia55173ea5ded32faecf391507c9099a407a199b6
QA: favor unless over if-not

Change-Id: Ib15b6110a2dfe89c4e92864c4ab268243c165cef
QA: unnecessary parentheses

Change-Id: I126122aaf21effb5c0787aeaa3811d0806d46228
QA: missing space after comment # character

Change-Id: Ib982390dbf22b4131d9b1c34f8e37b0efcb5dea8
QA: indentation width fixes

Change-Id: Ibf97dd9437716cba08d63eb250428c697be489e6