`eg,` to `e.g.,`

Used:

```bash
find * -type f -exec sed -i 's/\beg,/e.g.,/g' {} \;
```
`eg` (without a comma) to `e.g.,`

Used:

```bash
find * -type f -exec sed -i 's/\beg\b/e.g.,/g' {} \;
```
`ie,` to `i.e.,`

Used:

```bash
find * -type f -exec sed -i 's/\bie,/i.e.,/g' {} \;
```
`ie` (without a comma) to `i.e.,`

Used:

```bash
find * -type f -exec sed -i 's/\bie\b/i.e.,/g' {} \;
```

Restructuring >80 character docstring
Merge pull request #3748 from yuvallanger/patch-eg-with-dots

DOC : `e.g.` and `i.e.` look nicer than `eg` and `ie`