Consistent styling for bash code blocks

[rosemm]

Check all modules with command line code blocks (generally, bash or git). Here's a list:

• bash_command_line_101
• bash_command_line_102
• bash_103_combining_commands
• bash_conditionals_loops
• bash_scripts
• docker_101
• genomics_setup
• genomics_quality_control
• git_creation_and_tracking
• git_history_of_project
• git_setup_mac_and_linux
• git_setup_windows

For each, verify the following:

• Code blocks show either input or output. If a single code block shows both input and output, break it into two. (Note that there's no need to include an output block for every command --- it's fine to have input with no output or vice versa if that makes sense pedagogically.)
• Input code blocks (commands for learners to run) should be just plan code blocks, starting and ending with a set of backticks and optionally the name of the language but nothing else.
• Output code blocks (the results displayed in the terminal) should begin with a set of backticks followed by +Output

For example, here's an input block followed by its output block:

```bash
head -n 4 SRR2584863_1.fastq
```

``` +output
@SRR2584863.1 HWI-ST957:244:H73TDADXX:1:1101:4712:2181/1
TTCACATCCTGACCATTCAGTTGAGCAAAATAGTTCTTCAGTGCCTGTTTAACCGAGTCACGCAGGGGTTTTTGGGTTACCTGATCCTGAGAGTTAACGGTAGAAACGGTCAGTACGTCAGAATTTACGCGTTGTTCGAACATAGTTCTG
+
CCCFFFFFGHHHHJIJJJJIJJJIIJJJJIIIJJGFIIIJEDDFEGGJIFHHJIJJDECCGGEGIIJFHFFFACD:BBBDDACCCCAA@@CA@C>C3>@5(8&>C:9?8+89<4(:83825C(:A#########################
```

[rosemm]

Note that this change is actually already included in the docs instructions for code blocks! https://liascript.github.io/course/?https://raw.githubusercontent.com/arcus/education_modules/main/docs.md#69