[intro.scope] Fixed section id.
[expr.prim.req] Applying wording fixes.

Join paragraphs to eliminate unnecessary single-liners.
Various formatting fixes.
[intro.scope] Capitalize "Technical Specification."
[intro.scope] Fix articles in paragraph 2.
[intro.ack] Fixed quotation style.
[expr] Update the list of unvevaluated operands in p8.
[expr.prim.req] Add a note to ad hoc constraints.

Also fix a broken reference.
[intro] Remove "C++" before standard references.
[expr.prim.req] Applying wording fixes.
Merge pull request #67 from Blzut3/master

Intro fixes
Merge pull request #66 from jicama/master

[various] change "abbreviated function" to "abbreviated function templat...
Merge branch 'master' of https://github.com/cplusplus/concepts-ts
[dcl.spec.auto] change marks for example