| 2019-07-04 | Chengsong | still will not compile | file | diff | annotate |
| 2019-07-04 | Chengsong | will not compile, just text | file | diff | annotate |
| 2019-07-04 | Christian Urban | proofread | file | diff | annotate |
| 2019-07-04 | Christian Urban | spell check | file | diff | annotate |
| 2019-07-03 | Chengsong | another changes. have written more. but havent typed them. tomorrow will continue. | file | diff | annotate |
| 2019-07-03 | Chengsong | s? | file | diff | annotate |
| 2019-07-03 | Chengsong | s | file | diff | annotate |
| 2019-07-03 | Chengsong | example | file | diff | annotate |
| 2019-07-03 | Christian Urban | proof reading | file | diff | annotate |
| 2019-07-02 | Chengsong | changes | file | diff | annotate |
| 2019-07-02 | Chengsong | half easy changes | file | diff | annotate |
| 2019-07-02 | Chengsong | new changes | file | diff | annotate |