Make DumpMachine/DumpRegister output more compact and reduce use of Unicode symbols

Nobody has claimed this yet.

**Is your feature request related to a problem? Please describe.**
1. DumpMachine output is very verbose. In my default screen layout, I can see one complete DumpMachine output with 4 basis states, anything extra requires scrolling. Our teleportation sample, for example, has 8 DumpMachine outputs, requiring a lot of scrolling, and the "DumpMachine:" headers and empty lines dominate the output.
2. Symbols ⟩ and 𝑖 are not recognized by a lot of editing environments (such as LaTeX), so copy-pasting DumpMachine output requires post-production.

**Describe the solution you'd like**
1. Remove "DumpMachine:" header from before the table of basis states, and some of the empty lines around it.
2. Replace 𝑖 with i in the complex number output. I don't think we can replace ⟩ as easily, using > is _very_ ugly, but having i in italic doesn't add a lot of visual value.

Start by locating the DumpMachine and DumpRegister output entry points and compare their current formatting with the requested examples. Done means removing the DumpMachine header, reducing surrounding empty lines, and using a plain i in complex-number output while preserving the requested basis-state output.

Written by the indexing model from the issue text.