Suggestion: Unify Subscript Notation to be Consistently Right-Associative

[rokk1t]

To ensure notational consistency, the paper should standardize on a single subscript style:

• Left-associative: ${a_b}_c$.
• Right-associative: $a_{b_c}$.

I suggest standardizing on the right-associative style as it is more readable.

Examples from Yellow Paper:

• a_{b_c}
  • I_{\mathrm{H}_{\mathrm{p}}}
• {a_b}_c
  • {I_{\mathrm{H}}}_{\mathrm{c}}
  • {I_{\mathrm{H}}}_{\mathrm{s}}
  • {I_{\mathrm{H}}}_{\mathrm{i}}
  • {I_{\mathrm{H}}}_{\mathrm{a}}
  • {I_{\mathrm{H}}}_{\mathrm{l}}
  • [I_{\mathrm{a}}]_{\mathrm{b}}
  • {I_{\mathrm{H}}}_{\mathrm{f}}