GLSLangSpec.4.60.pdf missing subpassinput in Gramma definition

This is probably in other versions of the glsl spec too but when processing the gramma definitions in the 4.6 spec there is no mention of the subpassInput and subpassInputMS keywords in the token list returned from lexical analysis and this no mention of it in the shading language gramma.

Is it just a case of creating the right tokens and adding to type_specifier_nonarray: ?

Review GLSLangSpec.4.60.pdf, starting with the lexical-analysis token list and the shading-language grammar around type_specifier_nonarray. Confirm how subpassInput and subpassInputMS are represented in both places, then update the specification source so the generated document includes the missing definitions and verify the resulting PDF.

Written by the indexing model from the issue text.